Details for the 3D Printing Workshop can be found at https://aip-congress.org.au/workshop.html

Details for the ANFF workshop can be found at https://aip-congress.org.au/workshop.html

The laser increased the intensity of light that can be generated by orders of magnitude and thus brought about nonlinear optical interactions with matter. Chirped pulse amplification, also known as CPA, changed the intensity level by a few more orders of magnitude and helped usher in a new type of laser-matter interaction that is referred to as high-intensity laser physics. In this talk, I...

The diamond NV center offers a uniquely versatile path towards nanoscale imaging of condensed matter and biological systems. Here I present NV-based magnetic imaging experiments and discuss challenges to improved resolution and sensitivity, largely focused on materials engineering and tackling interface-induced decoherence.

Astrophotonics lies at the interface of photonics and astronomical instrumentation. The power of photonics and Adaptive Optics, together with the development of new photonic devices, strengthens the case for astrophotonics year by year.

Quantum Hall systems are of broad interest as they cover low-dimensional quantum systems, strong charge correlations, and topological physics. Our results lead to a unified understanding of the relaxation processes in graphene over different magnetic field strength regimes.

We present a numerical model of an early universe analog using a Bose-Einstein condensate, including temperature effects and topological properties. This may provide an insight into the particle-antiparticle asymmetry seen in our universe.

Results from the Facility for Rare Isotope Beams (FRIB) reveal the first microsecond isomer for exotic N=20 nuclei. Implications for nuclear structure and the competition between spherical and deformed shapes will be discussed.

Our team have performed Quantum Natural Language Processing on an IBM quantum computer and our own trapped-ion hardware. Key to achieving this is the observation that quantum theory and natural language are governed by much of the same compositional structure.

Metal halide semiconductors have emerged as attractive materials for solar cells. In this talk I will discuss some of our recent work exploring the optoelectronic properties of lead-iodide perovskites and silver-bismuth halide semiconductors.

In this work, we experimentally create a lattice of vortices in a two-dimensional BEC and map the vortex density as the lattice melts. These states have gained prominence as an analogue of electrons in the quantum hall effect.

This invited talk will discuss the molten core method for fabricating a wide variety of novel glassy and crystalline core optical fibers, exhibiting an equally wide variety of fascinating properties not previously known

Recent advances in device physics, nanotechnology, AI, and sensor fusion is leading to a revolution in smart sensor technology to provide multi-faceted interfaces to the three-dimensional physical, chemical, and data environment, enabling high-performance information gathering and real-time situational awareness.

Future interferometric gravitational-wave detectors are predicted to be impacted by low-frequency relative displacement motion between their seismic isolation platforms. We will present the advantages, sensitivity targets and latest prototype developments towards a digitally-enhanced interferometric sensor for measuring this motion.

This talk discusses a rigorous analysis of phasemeter behaviour in the ultra weak-light regime. We explore the fundamental limit in optical power at which heterodyne phase tracking measurements can be reliably performed, Focused on application in space-based interferometry.

Adaptive optics (AO) is critical in astronomy, optical communications, remote sensing, and optical beam manipulation to correct distortions caused by propagation through media like the Earth’s atmosphere or living tissue.

In this work we show the results of an atomistic tight-binding approach coupled with the Non-Equilibrium Green’s Function (NEGF) formalism when applied to phosphorus doped silicon tunnel junctions that can be manufactured with sub-nanometre accuracy.

This research illustrates a novel method of stabilizing the laser in the LISA mission with respect to two references – the on-board optical cavity, and the inter-spacecraft separations or the arms of the interferometer

Tuning the charge transfer and optoelectronic properties of 2D materials such as black phosphorus (BP) by hybridising it with an organic semiconducting polymer.

This work explores using CO-laser heating to fabricate speciality optical fibre from unconventional materials. The unique temperature dynamics of this furnace demonstrated fine control of crystallisation in crystal-core glass-clad fibres.

Transverse force tomography is a relatively new technique that offers an alternative perspective on confining forces in Quantum Chromodynamics. We present the first lattice QCD computation of the spatial distribution of the "Colour-Lorentz" forces in the proton.

We demonstrate the laser cooling techniques for rapid production of a metastable helium BEC. The experimental setup features an in-vacuum magnetic trap and a cross-beam optical dipole trap. We obtained a pure BEC of 1 million atoms in 3.3 seconds.

We report robust fibre Bragg grating (FBG) sensors that optically measure environmental conditions in harsh, corrosive, biofouling wastewater networks over long periods.

Information loss in black hole evolution is one of the longest-running controversies in theoretical physics. However, the discordant properties of different generalisations of surface gravity reveal that the problem cannot be formulated self-consistently in semiclassical gravity.

I would like to apply for a talk (preferred) or poster. I am the primary author of the paper and the one which will present.

Please find attached the abstract in .pdf format.

We present the characterization of the simultaneous four offset-optical phase-locked loop set up used as part of a Newtonian noise sensor readout, and discuss their performance and limits with respect to the scientific requirements for the experiment.

An overview of the free-space optical communications research being conducted at UWA, with emphasis on the development of the Western Australian Optical Ground Station and results from field tests with a deployable mobile optical terminal.

Demonstrating the first positive-patterning process for creating passivated waveguides in porous silicon films using laser writing in a controllable atmosphere to retain an open pore structure suitable for highly sensitive optical sensor applications.

We build low depth parity check gate set such that these gates become the most natural gate for QEC implementation.By building gates that are fundamental to QEC rather than universal computation,we can boost the threshold and ease the experimental hardness.

This work studies of families of laser models that exhibit both Heisenberg-limited beam coherence, and sub-Poissonian beam photon statistics. In particular, we investigate if imposing sub-Poissonian statistics comes at the expense of a reduction in the coherence.

Compactified extra dimensions are well motivated BSM candidates. I will talk about the behaviour of scattering amplitudes of Kaluza-Klein gravitons in both flat and warped extra dimensions and assess the range of validity of the low-energy effective Kaluza-Klein theory.

β-Ga2O3 gratings were fabricated by inductively-coupled-plasma (ICP) etching process to have a clearer understanding of dry etching mechanism during semiconductor device manufacturing process. Different parameters were adjusted to investigate their effects and find the best etching recipe.

We present our experimental progress towards demonstrating quantum non-locality in a matter wave system of ultracold helium via a Rarity-Tapster interferometer. The momentum entangled state used for the violation is generated by colliding helium Bose-Einstein condensates.

Shell effects in nuclear fission of superheavy oganesson-294 are investigated through simulations of quasifission trajectories. Results show that shell effects from fission affect quasifission along with excitation energy dependent changes.

We present the key considerations in our design for using optical interferometry to phase-lock optical phased arrays with up to 100 million emitters, needed for the ambitious proposed Breakthrough Starshot mission.

How to experimentally investigate the fidelity of injected states for error-corrected quantum computing using the surface code and superconducting qubits. The injection method with the highest resultant fidelity minimises the need for resource-intensive state distillation.

We propose a new, low-loss method of cooling neutral alkali atoms to quantum degeneracy by optical feedback control. We present full-field quantum simulations demonstrating the viability of the technique, and show robustness to realistic experimental imperfections.

We report high-quality MBE growth and a mechanical property study of HgCdSe layers on GaSb (211) substrates. Both the crystal quality and the mechanical properties of HgCdSe have been demonstrated to be comparable to those of HgCdTe

We have developed a measurement platform that can report the T1 spin lattice relaxation time from an ensemble of fluorescent nanodiamonds in solution. This platform can be used for rapid material characterisation and chemical sensing in a convenient cuvette-based approach.

By adopting a Maxwell-Einstein picture of a (2+1)-dimensional superfluid it is predicted that vortex quasi-particles (kelvons) posses an intrinsic spin. We examine the possibility of implementing topological non-abelian geometric phases on such kelvon spins.

This presentation addresses the design and implementation of the pyrate software system developed within the context of the SABRE experiment for dark matter direct detection. The system is oriented at processing and analysing the data collected by the experiment.

We report recent progresses and discuss key technical challenges in research and development of specialty silica optical fibres via 3D printing technologies.

Designing Hartmann wavefront sensor telescopes for improved sensing of thermal aberrations in large diameter optics inside gravitational wave interferometers.

The measurement of optical wavelengths using speckle is a promising tool for compact and precise wavemeters/spectrometers. We explore the limits of a speckle pattern-based wavemeter, aiming to achieve a measurement precision better than an attometer.

We demonstrate a logical no-go theorem on a version of the Wigner's friend thought experiment which strengthens previous device-independent no-go results and opens new questions on the interface of quantum foundations and modal logic.

We have developed an artificial neural network decoding technique for large scale surface codes with complex boundaries suffering a variety of noise models.

An integrated optic 4-telescope beam combiner is being developed for the detection of exoplanets using nulling interferometry. The beam combiner, fabricated using ultrafast laser inscription, is optimised for achromatic behaviour in the mid-infrared (3.5-4.0 µm).

This is theoretical work on quantised vortices in superfluids with a specific focus on connections between the theory of rotating neutral superfluids, topological quantum computation, and gravitation endowed by an acoustic metric.

Here we report the optimization of the growth of superconducting boron doped diamond on insulating diamond substrates via microwave plasma chemical vapor deposition (MPCVD) using a 3D-printed titanium Faraday cage, which leads to superior uniformity in growth and boron incorporation.

Long Lived Particles are predicted in many BSM models. This is an overview of previous analyses to highlight where missing energy, with additional data may be more sensitive to SUSY signals, or to help set limits on supersymmetric particle masses.

In this talk, we will present our latest developments of the advanced low-frequency rotational accelerometer that has direct utilization in seismology applications and seismic isolation in gravitation wave detectors.

Rotational Optical Tweezers provides a unique tool to perform dynamic microrheology of intracellular vesicles using an internalised vaterite microsphere. Here, we discuss the required calibration of trapping power and the probe radius for successful microviscometry.

Artificial intelligence is a powerful tool for science, but an important question is how to extract true scientific understanding. We present a method that enables new understanding, and demonstrate its application to quantum photonics.

The growth of QCLs requires an understanding of the interfacial properties of the superlattice (SL) active region. Atomic probe tomography is used to elucidate the interfacial properties within the QCL, and incorporate these observed properties into advanced QCL designs.

We report on recent advances in reconstructing the internal quark and gluon structure of the nucleon through global QCD analysis of high energy scattering data.

OPTICA Vice-President Keynote Talk

Authors: Gerd Leuchs 1,2,3, Vsevolod Salakhutdinov 1, Margaret Hawton 4, Luis L. Sánchez-Soto 1,5

1 Max Planck Institute for the Science of Light, Erlangen, Germany

2 Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany

3 Nexus for Quantum Technologies, University of Ottawa, Canada

4 Lakehead University, Thunder Bay, Canada

5 Universidad...

In this talk I will discuss recent dynamic neutron scattering results from two natural minerals, linarite and atacamite, detailing the extent of our knowledge of these two copper oxide materials.

The immediate prospects of solving real-world problems on near-term Noisy Intermediate Scale Quantum hardware is largely dictated by device noise/errors. We have developed an alternative approach to error mitigation strategies based on quantum computed moments to improve energy/cost function results.

We discuss Figures of Merit for quantifying the sensing performance of hollow-core terahertz light cages with respect to free space propagation. Our results point to light cages as a way of improving terahertz phase sensing capabilities.

The gravitational-wave observation of GW200129 hinted at the presence of spin-precession - an important observation for understanding black-hole binary formation. We discuss how this observation may instead be attributed to noise transients in the gravitational-wave detectors.

Black holes, white holes and wormholes can be treated in a unified fashion. Starting from two natural assumptions many of their properties, sometimes in conflict with the usual semiclassical expectations, can be obtained.

Using optical tweezers for the better understanding of how the microrheology of reproductive cells and their local environment during *in vitro* procedures is correlated to embryo development, implantation success, pregnancy, and live birth.

This presentation will cover the translation of optical imaging to address challenges in endocrine surgery. Three different techniques will be used to (a) detect the parathyroid gland, (b) perfusion of the gland and (c) visualize the nerves during surgery.

High spin donor atoms are objects of interest in semiconductor quantum architectures due to their large Hilbert space dimensionality. Here we demonstrate high fidelity coherent control over the 16-dimensional Hilbert space of a single 123-Sb atom implanted in silicon.

Gaussian Boson Sampling (GBS) is a prominent model of quantum computing. We experimentally demonstrate both GBS with displacements and with time-bin encoding for the first time. The latter is used to search for dense sub-graphs.

Physical black holes are considered to be trapped regions bounded by the apparent horizon. Even though assuming that semi-classical physics is valid and curvature is not diverging there, other things suggest that the apparent horizon is a mildly singular surface.

Calculating the Larmor precession phase evolution to measure magnetic fields at arbitrary frequencies with an Non-linear Magneto-Optical Rotation (NMOR) atomic magnetometer.

We present a microscopic theory of thermally-damped vortex motion in oblate atomic superfluids, providing a microscopic origin for the damping and Brownian motion of quantized vortices in two-dimensional atomic superfluids, which has previously been limited to phenomenology.

A tactile sensitive silicone-based artificial skin is fabricated on a fingertip model with embedded ZEONEX-based polymer Bragg gratings. Through tactile force feedback and the aid of machine learning, contact localization throughout the fingertip is achieved.

The data provide new aspects about the scaling behavior of the skyrmion and helical distances. This offers new valuable information on the parameters in the spin Hamiltonian, which are responsible for the formation of the fascination quantum protected objects.

In this work a 3D CdTe layer was grown on 2D Sb2Te3 nanosheets through molecular beam epitaxy, subsequently the heterostructure at the interface was studied by TEM, suggesting high quality epitaxial growth materials promising for applications in future optoelectronic devices.

The beauty and charm quarks are ideal probes of perturbative Quantum Chromodynamics, owing to their large masses. The formation of hadrons from quarks produced in different parton-parton interactions within the same proton-proton collision is studied using doubly-heavy hadrons.

We employ heralded amplification and quantum state teleportation to implement a channel capable that corrects for loss in quantum communication. Our channel genuinely outperforms direct transmission through high amount loss without relying on postselection.

This talk focuses on work completed in adapting continuous gravitational wave search techniques, currently only sensitive to long lived stable neutron stars, to be suited to detecting young neutron stars with rapidly changing frequency.

The deterministic implantation of single donors in silicon is realised using ion beam induced charge detectors. This will enable the fabrication of arrays of donor spin qubits, required to scale up the promising quantum computing platform of donors in silicon.

We model the effects of coating nanodiamonds with glass, to mitigate some of the particle-to-particle variability with as-received nanodiamonds by creating a more uniform spherical shape. Such new particles represent a new platform for multi-function quantum biosensing.

I will outline recent work towards developing a nanometer sized acoustic sensor based on 1D photonic crystals, which can be used for fibre-based optomechanical acoustic sensing.

Terahertz sensing holds promise for applications in precision agriculture due to the sensitivity of terahertz waves to hydration.

Here we present a laser-based terahertz imaging technique to evaluate temporal change of hydration in leaves.

By performing a combined analysis of data from pion-Nucleon scattering experiments with first-principles calculations from lattice QCD, we gain insight into the composition and structure of the low-lying odd-parity Nucleon resonances.

When subjected to a rotating magnetic field, the resulting precession of the dipole moments of a dipolar BEC imparts angular momentum to the system. We show how this can be used to generate vortex lattices, as observed in recent experiments.

Different methods for compiling analog quantum control pulses for the diamond quantum processor, speed and error benefits of using analog control, and semi-analytical optimisation of analogue control pulses.

Skin and prostate cancer have quite high incidence rates in New Zealand, Australia and the rest of the world. Identifying suspicious tissue for diagnostic and biopsy is a core challenge for treating both of these diseases. Optical spectroscopy offers rich datasets to improve the identification of diseased tissue. This presentation will discuss our recent advances.

We generate and verify entanglement in sizeable multiqubit states prepared on IBM Quantum superconducting devices. We report the detection of whole-device bipartite entanglement on a 65-qubit quantum device and genuine multipartite entanglement over all qubits of a 27-qubit quantum device.

In this talk, I first introduce the Kitaev spin liquid and discuss its properties. I present some stunning features such as the formation of Majorana fermion Landau levels.

We apply machine learning methods to control and optimise the stirring protocol imposed on Rubidium-87 Bose-Einstein condensates in experiment. The optimisation allows for controlled generation of various persistent current states albeit with no universal optimum stirring parameters.

Quantum autoencoders use machine learning techniques to compress quantum data and are predicted to be useful for noise mitigation. Our ongoing work aims to experimentally demonstrate denoising of four-dimensional quantum states.

Exact solutions to Einstein's field equations are notoriously difficult. In this work we obtain expressions for the metric tensor for the interior of a star, i.e., for static spherically symmetric space-times with positive and monotonically decreasing density and pressure.

I focus on the QCDSF/UKQCD/CSSM lattice collaboration's advances in calculating the forward Compton amplitude of nucleon via an implementation of the second-order Feynman-Hellmann theorem. I highlight our progress on investigating the low moments of (un)polarised structure functions of the nucleon.

We report on a polyurethane capillary fiber sensor that transduces body movements containing information of physiological parameters such as respiratory and pulse rates. We also investigate key factors, like transfer function, for successful system design.

We study the behaviour of drag in superfluids and observe the universal relation between the Reynolds number and drag coefficient in superflow. This establishes hydrodynamic scale invariance extends into the limit of quantum fluids.

Fast two-qubit phase gates with trapped-ions are feasible with an expected gate fidelity of 77.8% using a sequence of our ultrafast picosecond laser $\pi$-pulses. Such sub-microsecond gate operations support the development of scalable quantum computers.

We exploit the complex nature of light transmission through multimode fibre for distributed fibre temperature sensing. This is achieved by training a regression deep neural network for extracting distributed temperature information from fibre wavelength spectra.

We present the machine learning design of nanoscale-engineered InGaN-based QW with ten sublayers for enhanced performance based on a heuristic algorithm. Such a design approach can achieve significant improvements in the material gain characteristics and current density of QW.

We discovered a new practical method of perfectly amplifying and teleporting multiphoton light. It is shown to be better than established alternatives. This type of amplifier is useful for a huge variety of quantum technologies.

Refinement and adaptation of the distributed feedback fiber laser based hydrophone for the remote monitoring of marine traffic is reported. Hydrophone bandwidth and multiplexing noise have been mitigated; a substantial increase in hydrostatic pressure compensation depth has been demonstrated.

Pertaining to the analysis of heavy vector production at the LHC, this project focuses on vector boson fusion as the dominant production channel for heavy vector triplets and presents limits within the relevant parameter space.

There is growing interest in developing visible light-emitting fibre lasers. Currently, they rely on fluoride-fibre but for some transitions silicate fibre may be suitable. Here I review silicate-based fibre lasers and offer ideas for allowing them to generate visible light.

Nitrogen Vacancies in diamond nanoparticles are employed for in situ monitoring of the magnetic state of photomagnetic materials down to the single particle level, the stability of molecular cages containing atomic Nitrogen, and spin active products of photocatalysis.

In this talk I will present work on the magnetic excitations of two contrasting strongly correlated electron systems.

We present an overview of recent research in our Atom Optics lab, including the development of magnetic optical elements for manipulating beams of ultra-cold atoms, magnetic microstructures, and time crystals using ultra-cold atoms bouncing on an atom mirror.

We present an optical methodology for classifying embryo metabolism based on hyper-spectral imaging and artificial intelligence. It successfully distinguishes oocytes from old and young mice and control from metabolically altered embryos, with potential to empower embryologists in in-vitro fertilization clinics.

Optical quantum computing with continuous variables offers the tantalising promise of room-temperature operation and vast scalability. Here I present an overview of recent key advances in scalability and fault tolerance with this platform.

We present single-molecule level sensing of biomarkers by a solid-state nanopore sensor, a next-generation nanoelectronic sensor, as a diagnostic tool at ultra-low concentrations and volumes. We are now exploring protocols to operate in complex samples like blood and saliva.

Optical atomic clocks combined with the proliferation of compact optical frequency combs, offer higher inherent timing stability versus their current microwave counterparts. We detail the development and demonstrations of our portable optical atomic clock technology with bespoke comb outside the laboratory under rugged conditions, and outline future directions.

We measure NMR signals via their modulation of the NV spin-state dependent red photoluminescence intensity using a time-resolved quantum heterodyne detection scheme.

Energising and interrogating distributed feedback fibre laser hydrophones in remote deployment scenarios requires management of the propagation loss, optical nonlinearity and judicious selection of the pump wavelength. We characterise the system for a range of pump wavelengths spanning from 1480-1540nm.

Here I briefly develop a theory of the experimental signature of a hypothetical time-crystal using neutron spectroscopy as a probe of the coherent dynamics in a lattice system, assuming a suitable driving mechanism such as intense terahertz light.

We present high performance HgCdTe infrared photodetectors for sensing applications in the mid-wave spectral band of 3~5 μm based on the n-on-p technology.

We highlight the potential uncertainties that may arise from the nuclear components of WIMP-nucleus scattering amplitudes, due to nuclear structure theory within the framework of the nuclear shell model.

- Study metastable excited states for these ions as clock transitions in optical clocks.
- Calculating several atomic properties.
- CI+SD and CIPT methods are used.
- Black body radiation (BBR) found 10^-16-10^-18.
- The enhancement coefficient reached K= 8.3.

We present the theoretical study of diamond spin maser magnetic field sensor’s limitations considering a detailed photo-physics of the spins. We also present our progress towards the experimental realization of such a sensor.

We study spin-exchange collision as a route to thermally robust entanglement of two atoms in a microtrap. For probing it, we perform a Hong-Ou-Mandel experiment in which a Raman transition pulse plays the beam splitter role and compare with simulation.

Cluster states in continuous-variable quantum computing come in various configurations. The authors demonstrated a significant drop in the required quality of a particular configuration. Here, we also present those improvements in other configurations.

Research into a novel silk-hybrid material with capabilities of detecting pH changes in wound fluid via fluorescence spectroscopy may be implemented to assist in early detection of wound infection.

We describe the development of ultra-stable single-frequency 10W thulium fibre master oscillator power amplifiers at wavelengths between 1900nm and 2050nm, for gravitational wave detection. Environmental isolation and minimal wavelength drift is achieved using a two-stage temperature-controlled mount.

We present a compact, wireless imaging probe using a cost-effective camera-based technique, stereoscopic optical palpation, towards intraoperative tumour assessment for breast cancer surgery. This probe could help surgeons effectively remove cancer during the operation, reducing the need for follow-up surgery.

We investigate the photo-physics of the nitrogen vacancy centre to improve the optical readout fidelity by designing a new decomposition technique to extract spin state information.

We investigate excitation of atoms using extremely short pulses of light with intensities above $10^{14}$ W/cm$^2$. The carrier-envelope-phase of the pulse modifies the interaction and marks a change in the dynamics.

We discuss fabrication challenges to realize plasmonic MEMS-enabled tunable LWIR filter consisting of a suspended perforated gold membrane with a vertically actuated thin silicon structure above it.

We provide a quantum algorithm for time-dependent differential equations with only logarithmic dependence on the error and derivative. It can be applied to discretised partial differential equations for simulation of classical physics.

In this work, we show that light emitted from generic Ultra-Strongly Coupled system demonstrates suprising, unbounded strong bunching of photons. We explain the origin of this effect, its dependence on driving mechanism, and discuss potential applications.

The quark-gluon vertex is an important ingredients of one of the strong interaction. It is an essential ingredient in functional approaches to nonperturbative quantum chromodynamics. We will summarise the latest developments in quark-gluon vertex and its implications in hadron physics.

We present the experimental study of active nanostructured fiber devoted to simultaneous laser emission at two wavelengths, 1040 nm and 1534 nm. The fiber core is formed with two types of nanorods doped with ytterbium and erbium ions.

We provide a suite of methods to discover the causal model of a quantum process. It is the first complete toolkit for quantum causal discovery, taking into account experimental and computational limitations.

We investigate employing quantum machine learning algorithms for B meson flavour tagging, an important component of the experiments at Belle-II which study heavy quark mixing, CP violation and the matter-antimatter asymmetry of the universe.

To reveal the critical role of the A-site molecular ions in the polarization-related properties, we investigate three MOFPs that have the same Mg(HCOO)3− frameworks with different molecular ions: [CH3NH3][Mg(HCOO)3] (MA-MOF), [(CH3)2NH2][Mg(HCOO)3] (DMA-MOF), and [C(NH2)3][Mg(HCOO)3] (GUA-MOF).

We propose and demonstrate a novel spectroscopy method on donor spin qubit in silicon, which resolves the challenge of low frequency noise estimation with fine resolution

In this paper, we present the proof of concept of a fast silicon nitride photonic switch with MEMS actuation by using conventional lithography. Fabrication and optical characterisation of the device have been demonstrated successfully.

Radioactive Noble Gas isotopes are ideal tracers of environmental processes. Due to their low abundances, a lack of measurements is a limitation in climate modelling. We present progress towards an Atom Trap Trace Analysis (ATTA) facility for overcoming this limitation.

We have developed a nanoparticle tracking method for direct observation of the in-vitro BBB penetration process, enabling in-depth studies of the mechanisms and pathways for nanoparticle agents to penetrate the blood-brain barrier.

We report upon a prototype optical clock using a two-colour two-photon transition in Rubidium, toward developing a compact alternative for the next generation GNSS.

Engineering of randome lasing in nanoporous photonic crystals

Our work aims to develop a naturally extracted, transparent silk fibroin dressing, integrated with temperature and pH sensors, capable of monitoring early signs of infections, healing disruptions and scar formation via light-based measurements.

In this work, we introduce a semi-ab initio method for modelling the bound-hole states of the negatively-charged NV center (NV-). Our semi-ab initio approach can be readily adapted to other deep defects in semiconductors.

What is expanding space? What came before the big bang? Is there an edge to space? What’s beyond the horizon of a black hole? What can the amazing images from the James Webb Space Telescope tell us?

When I'm having a chat with family and friends, these are the questions I’m asked.

So upgrade your repertoire for cocktail party conversation by learning about these and other cosmological...

Many efforts around the world are now pursuing the ambitious goal of utility-scale, fault-tolerant quantum computing. Consistent themes are emerging across the field, as teams attempt to scale from existing small systems to the millions of qubits needed for useful applications. Systems partitioning, manufacturability, cooling power, networking, and control electronics are recurring challenges...

This talk requires no particular technical mathematics background, as I will talk entirely in terms of simple pictures. These are the pictures of my new book, "Quantum in Pictures" [1], which is aimed at the teenage enthusiast, and pretty much everyone else too - the book had a more technical predecessor [2].

One finds the same pictures in natural language, and much of the high-level...

We experimentally realize intrinsic chiral metasurfaces where the engineered slant geometry breaks both in-plane and out-of-plane symmetries. Our result achieves intrinsic chiral bound states in the continuum with near-unity CD of 0.93 and quality factor exceeding 2300 for visible frequencies.

Beyond high-capacity communications, space-division multiplexing fibers bring many advantages to optical and microwave signal processing, as not only space but also chromatic dispersion are introduced as new degrees of freedom.

Finite-volume pionless effective field theory is an efficient framework with which to perform the extrapolation of finite-volume lattice QCD calculations of multi-nucleon spectra and matrix elements to infinite volume and to nuclei with larger atomic number. Recent progress is reviewed.

Silica hollow-core fibers (HCFs) are leading the way in advanced telecommunications and ultra- short pulse laser transmission. Chalcogenide HCFs will become the holy grail of CO2 laser transmission at 10.6 microns.

Our recent advances in wafer-scale integration of Micro-Electro-Mechanical Systems in Silicon Photonics have shown high performance tuneable couplers, filters, switches, and phase shifters that provide an advanced technology basis for emerging applications requiring very large-scale photonic integration such as programmable photonics.

We analyse the performance of Gottesman Kitaev Preskill quantum error correcting codes during gates and under realistic noise such as loss and dephasing using a new subsystem decomposition.

We are experimentally investigating possible departures from standard quantum mechanics’ predictions at the Gran Sasso underground laboratory in Italy. We are searching for signals predicted by dynamical collapse models, and signals indicating a possible violation of the Pauli Exclusion Principle.

In this talk I will discuss near-surface small-angle neutron scattering (NS-SANS), performed slightly above the critical angle of reflection, as a route to overcome the shortcomings of transmission SANS for extremely small magnetic sample volumes in the thin-film limit.

Room temperature optomechanical squeezing would enable many applications in sensing and quantum computing. However, decoherence makes this challenging. I will present work which show large suppression of decoherence at low mechanical frequencies, opening a path towards room temperature quantum technologies.

Abstract:

This talk explores the fabrications processes and “many knobs” that must be turned to achieve low nonlinearity performance in modern optical fibers.

Active optical fibers that exhibit intrinsically low nonlinearities such SBS supression or increased TMI thresholds is the end research goal for many groups. Materially, these phenomena are well understood, as is the method to achieve...

I give an update on the Global And Modular BSM Inference Tool and show the latest results for a model where the gravitino and the lightest neutralinos and charginos are the only light sparticles in the Minimal Supersymmetric Standard Model.

We developed scalable graphene metamaterials that show attractive optical and thermal properties. Through patterning with advanced laser nanoprinting technique, functional photonic devices with ultrathin, light weight and flexible nature have been demonstrated promising exciting opportunities for integrated photonics.

We present a general framework for using quantum error correction codes for protecting and imaging starlight received at distant telescope sites, which can enable long-baseline optical interferometry.

We prove a rigorous form of the adiabatic theorem for a discrete time evolutions. We use this discrete theorem to develop a quantum algorithm for solving linear systems that matches the known lower bound on the complexity of $\kappa$.

Spin-photon devices for on-chip silicon photonic quantum networks are demonstrated using the silicon *T* centre, a spin photon interface boasting long-lived spin qubits and spin-resolving optical transitions in a telecommunications band.

We built an apparatus that measures high-speed spectrally resolved mode transmission matrices. The field and modal coefficients were extracted at 3.8KHz, four times faster than the acquisition rate. This speed enables potential applications such as real-time imaging though multimode fibres.

I will introduce the concept of Spin gapless semiconductors (SGSs) and their unique features, highlighting the Dirac-type SGS which offers an ideal platform for massless spintronics and quantum anomalous Hall effect with a dissipationless edge state.

We investigate the nonlinear response of heavy impurity in ultracold Fermi gases and superfluid with a numerically exact approach. Our results are highly relevant for polaron physics.

We investigate the charge dynamics following the optical excitation of a single erbium ion inside a silicon FinFET. We observe a latched charge signal that depends on gate voltage, optical intensity and optical pulse length.

We investigate quantum spin systems realised in a dilute gas of ultracold polar molecules pinned in a deep optical lattice. We discuss a novel disorder mechanism for engineering many-body localisation, and explore the system's non-equilibrium dynamics in one and two-dimensions.

Au-Ag nanostars, with enhanced plasmonic properties due to multiple “hot-spots” on the tips, stabilized in BSA@PBS buffer solution without formation of protein corona. The prepared nanostructures were stable in biological fluid and preserved their original enhanced optical activity.

We report on development of a transmitter and receiver for lunar optical communications. The instruments will be installed on the ANU Optical Communications Ground Station (OCGS) at Mt Stromlo Observatory in Canberra, Australia.

We present an erbium-doped optical resonator with a quality factor of $10^8$ and up to 1.2GHz of coupling to an optical transition. By probing the optical resonances we can measure the erbium's response to microwave excitation of its spin transition.

Topological data analysis is an important way of understanding features of data, but can be exponentially hard classically. We present new ways of performing topological data analysis on a quantum computer with improved complexity.

We explore how generalisations of the Heisenberg principle arising from modified canonical commutation relations can produce significant effects in recent observations of optomechanical backaction noise, as well as in quantum trajectories of moments derived from general continuous position measurements.

Where does your mass come from? The Higgs mechanism only accounts for 1% of the proton mass. We reveal how centre vortices connect emergent phenomena such as quark confinement and dynamical mass generation with the QCD vacuum state.

In this work, HgCdTe infrared detectors are taken as an example to simulate and study the mechanical and optoelectronic properties of HgCdTe infrared material under curved conditions in order to understand the feasibility of fabricating curved HgCdTe image sensors.

We present an all-optical-fibre frequency reference with a state-of-the-art short-term stability of 0.1 Hz/$\sqrt{\text{Hz}}$, limited by double Rayleigh backscattering. The system also reaches the fibre thermal noise limit at infrasonic frequencies.

We explore finite-temperature phases of a spin-1 ferromagnetic Bose gas, identifying mass and spin BKT transitions, a vortex plasma phase, and novel critical scaling of spatial correlations.

A solid-core endlessly single mode mid-infrared polarization-maintaining photonic crystal fiber (PM-PCF) made of chalcogenide glass with an asymmetric pattern of longitudinal holes having different periods and diameters is presented. Simulation and experimental results are given.

In this talk we will show how a spectral filter, together with a weak Kerr nonlinearity, can be used to tune, and improve, the photon statistics of the spontaneous emission of a strongly-confined exciton-polariton system.

We demonstrate for the first time the programmable tuning of dielectric inverse-designed metasurfaces made of silicon by electrically driven transparent micro-heaters. This approach made sub-millisecond switching time and individually tuning metasurfaces possible.

Our team from PUC Chile and RMIT studied how to amplify the small mixed reflection Fresnel coefficients for topological insulators via a third Mu-Metal sublayer and discovered a measurable Poynting vector deviation near its surface, key for its optical characterization.

We present techniques, compatible with measurements in digital quantum simulations, for studying critical dynamics in quantum phase transitions, based on the Kibble-Zurek mechanism. In particular, we introduce a sample-and-hold protocol that enables the study of critical exponents in the system.

We present studies of the $\Delta$ baryon spectrum using lattice QCD and Hamiltonian Effective Field Theory. Our results suggest quark model-like states and meson-baryon two-particle states both contribute to the energy spectrum observed in experiment.

By simulating the Hanbury Brown and Twiss experiment results (second order correlation function) for a field of emitters, we study the effectiveness of using quantum correlations in emitter localisation.

Additive manufacturing makes it possible to produce complex structures and individual pieces directly from the CAD file within short production times. This research focuses on a filament extrusion method, where the objects are directly printed from a soda-lime glass filament.

Annealing effects in femtosecond laser-inscribed mid-infrared compatible fibre Bragg gratings (FBGs) are investigated via micro-reflectivity measurements. A process window for the fabrication of FBGs with improved thermal stability is identified.

We introduce a protocol for detection and correction of arbitrary continuous phase errors in a multi-channel quantum transmission system by integrated waveguide circuits.

We discuss the challenges that must be overcome for variational quantum computing to be able to solve chemical systems of more than a few electrons in the context of the variational quantum eigensolver and the quantum computed moments method.

An analytical model of the metal-organic superconductor, Cu-BHT, shows that its simplified lattice structure possesses three robust, degenerate flat bands at half-filling, which are narrower and more isolated than those of twisted-bilayer graphene.

We present a novel direction to enhance and control the degree of chirality in silicon-on-silica metasurfaces via an interplay between the nanoresonator symmetry and the symmetry of the metasurface lattice.

We report branching fraction and $CP$ asymmetry measurements of the $B^{0}\to\pi^{0}\pi^{0}$ decay mode at Belle II using a data sample corresponding to $198\times10^{6} B\bar{B}$ pairs. This is comparable sensitivity with 1/4th of the Belle dataset.

This talk will review the seminal work, and enduring legacy, of quantum pioneers Tony Klein and Geoff Opat in devising and performing the neutron-interference experiment which observed fermionic quantum phase acquired upon 2$\pi$ rotation.

In the dual HMW effect a topological phase emerges when electric dipoles pass around a line source of magnetic charges. When measured it also gave a much more precise measurement of the Aharonov Casher effect.

Atom interferometry offers stable, compact, primary sensing that can advance applications in ground water mapping, mineral exploration, planetary exploration and inertial navigation among other fields. I describe recent advances at ANU in techniques and applications.

Reporting on several of our recent works on the hyperfine anomaly and its importance in searches for new physics in precision atomic experiments.

Photoemission is the most information rich and widely used techniques for the elucidation of the electronic structure, surface states and chemistry of materials. The NanoESCA III, recently commissioned in Flinders Microscopy and Microanalysis.

In this keynote address, I will discuss opportunities for quantum innovation in Australia, barriers that need to be overcome, and strategies to build a strong quantum ecosystem to drive research up the value chain.

The report discusses novel all-glass optical fibers designs for dispersion management and its applications.

There is a rapid development in utilizing Terahertz frequencies for next generation of communications. In this talk, I will discuss how recent advances in photonics can facilitate low-loss and low-dispersion waveguides with exceptional bandwidth for terahertz.

Emulation of relativistic-like physics in photonic structures with Dirac spectrum has enabled observation of Klein tunneling and topological boundary modes in real and synthetic dimensions. We demonstrate another exciting emulation of trapped eigenstates of Dirac quasiparticles in photonic metasurfaces.

Based on the recent development of the quantum computer hardware, in

this talk we present new quantum neural network models and show their

performance for classification problems. We then discuss how far we can

simplify such quantum computational systems.

In this work, we examine the assumptions that give rise to barren plateaus in quantum neural networks and show that an unbounded loss function can circumvent the existing no-go results.

I will show the sorts of physics model that are currently evading detection at the Large Hadron Collider, and will present new ideas for how to extend the reach of particle searches with the ATLAS and CMS detectors.

We have used a combination of muonic-atom and atomic many-body calculations to extract magnetic hyperfine anomaly in caesium atom from muonic cesium measurements. Our result is important for cesium atomic parity violation studies.

Holmium-doped high power fiber lasers operate at an eye-safe wavelength and have numerous applications. In this talk, we discuss a new method of optical pumping for this technology - using GaSb-substrate-based high power laser diodes emitting at 1950 nm wavelength.

In this talk I will discuss using low-temperature scanning tunnelling microscopy and spectroscopy to measure the magnetic gap in 5 SL MnBi2Te4.

Mid-infrared spectroscopy has numerous applications. A host of new applications could be enabled by new types of mid-IR spectrometers with reduced size, weight, and cost. We will describe our recent work on a compact microspectrometer platform for chemical identification.

We review various methods used to estimate uncertainties in parton distribution functions (PDFs), finding that utilizing a neural network on a simplified example of PDF data has the potential to inflate uncertainties.

We summarize our recent results on design, fabrication and characterization of polarization maintaining anti-resonant hollow core fiber. Loss of 5.6 dB/km and phase birefringence of $1.8\times 10^{-5}$ is achieved.

Machine learning models are susceptible to *adversarial examples* - inputs to the model which have been manipulated in order to confuse it. We study the vulnerability and resiliency of quantum classifiers to such inputs.

Today’s challenge is to design compact, robust and mobile sensors which will lead to new generations of atomic sensors for mobile gravity mapping and GPS free navigation.

Characterisation of spectral properties of blue SPEs in hBN at cryogenic temperatures. High-yield fabrication allows for extensive study of this defect class. Resonant excitation revealed phonon-broadened linewidth as well as Rabi oscillations.

We propose and numerically investigate the mechanism of vector beams formation in terahertz spectral range via engineering the band structure of spatially inhomogeneous photonic metasurfaces supporting topologically trivial and non-trivial states.

Presentation of atomic excitation factors and calculated event rates for DM-electron scattering, and how they compare to the excess seen in the XENON1T experiment.

We design and demonstrate a 3D-printed horn coupler, improving the transmittance of a hybrid photonic crystal waveguide by more than 20dB, providing a convenient and economical way of customizing couplers for different waveguides and could be integrated in terahertz devices.

Inspired by 3D imagining problems we investigate methods of quantum encodings that are invariant to permutations of points in the original input for collections of 3D points (point cloud) data, within the context of a particle physics application.

Applying a comprehensive 20-band $sp^3d^5s^*$ tight-binding model with self-consistent field Hartree method to calculate energies of multi-electron states, we investigate the $D^-$ charging energies of donor molecules in silicon consisting of two phosphorus impurities in various orientations.

This work examines the sensitivity of the upcoming SABRE South experiment to the annual modulation dark matter signal. We also consider the effect of a hemisphere-dependent seasonal background on direct detection experiments.

By structuring the spatial profile of single photons, we were able to demonstrate different types of quantum advantages in metrological applications. This method also enabled an investigation into a new type of quantum state evolution with possible future applications.

We present a method – genetic algorithm for state preparation (GASP) – which generates low-depth quantum circuits for initialising a quantum computer in a specified quantum state.

Ultra-fast THz sources have been implemented into spectrometers offering small form-factor and broadband coverage. However, their low spectral power limits use to very thin samples. Here we demonstrate implementation of high power tunable SPS lasers into a spectrometric system.

This presentation will discuss preliminary attempts to perform Coulomb excitation of $^{124}$Te with the CAESAR array at the ANU as part of a larger investigation into the vibrational nature of near-spherical nuclei.

An efficient mid-infrared Er3+-doped fluoride fiber laser operating at 2.8 μm pumped by a single-mode laser at 1.7 μm has been proposed and experimentally demonstrated for the first time.

We report the first experimental generation of spatially entangled photon pairs from a metasurface incorporating a lithium niobate nonlinear thin film and the preparation of polarisation entangled states with a metasurface integrating two crossed metagratings.

Tapping mode atomic force microscopy was used to reveal nano-scale features and material variation near the surface of capture threads of glowworm (Arachnocampa tasmaniensis). Unstretched and stretched threads are contrasted.

I present diamond optomechanical systems with high mechanical and optical quality factors and long spin coherence times of the embedded, strain-coupled defect centers. Progress towards reaching high spin-phonon quantum cooperativity is discussed.

We theoretically and experimentally demonstrate a quantum clock implemented with a superconducting qubit and show the thermodynamic limit of the clock accuracy in the quantum regime is caused by the entropy production rate.

Metasurfaces constructed of subwavelength periodic arrays of metal particles have been shown to possess asymmetric optical transfer function with a relatively high numerical aperture of ~0.5 enabling phase imaging of diverse transparent objects.

This presentation will cover a number of atomic energy level measurements involving ultracold metastable helium atoms, including using a tuneout wavelength to probe atomic QED theory.

Record-long (200 km) single-ended random fiber laser and sensor, which can be used for safety monitoring of long-haul powerlines, are proposed and demonstrated based on combination of high-order random lasing pump and ultra-low-loss fiber, for the first time.

Using rubidium-filled hollow-core fibres we have reduced the optical power requirements of a no noise, high-bandwidth quantum memory protocol by two orders of magnitude, a key step towards a large-scale fibre-based quantum information network.

Total cross sections for all single-electron processes in proton scattering on molecular hydrogen have been calculated within a two-centre coupled-channel approach, providing improved agreement between theory and experiment for this challenging collisional system.

Fixed Field Accelerators offer potential advantages for particle therapy, however many challenges remain. We address the problem of resonance crossing during acceleration, showing that beam stability can be maintained by fixing the normalised focusing strength.

Nanophotonic devices enable image processing with potential for biological live-cell imaging and wavefront sensing. Here we demonstrate the use metasurfaces and thin-films for all-optical visualisation of phase modulations in an optical field and their application to biological imaging.

We employ nanopatterning, via diblock co-polymer lithography, and selective area-MOVPE growth to achieve high-density InGaN/GaN quantum dots for UV applications

The aim of this work is to investigate the inhibition of phosphine-protected Au9 clusters beneath a Cr(OH)3 overlayer to agglomerate under conditions of photocatalytic water splitting (i.e. UV irradiation).

We report synchrotron absorption measurements for MgO:LiNbO3 over a wide range of wavenumbers and temperatures. Spectra reveal the existence of an unexpected mode at 3.15 THz at all temperatures which explains the crystal's difficulty of THz generation at higher frequencies.

In this talk, I will discuss recent developments in the field of nanomechanical computing. Specfically, I will propose the first error correction architecture for integrated nanomechanical systems that uses majority voting logic.

The coupling of light with a mechanical degree of freedom is ususally limited to exciting mechanical modes that are defined by the structure being used. We are working towards a regime where light can be used to define mechanical modes.

Disordered arrays of plasmonic colloids provide a means for broadband optical absorption, due to equipartition of energy and convergence of internal mode lifetimes. We examine such systems from the viewpoint of energy harvesting and enhanced light extraction.

I will discuss how first-principles lattice QCD calculations are yielding new insights into the structure and interactions of nuclei.

We demonstrate the controlled engineering of boron vacancy defects creation in two dimensional material hBN. The spin state in these defects can be controlled optically which is highly desirable for realization of quantum devices and scalable quantum communication technologies.

I will discuss our recent work in using small molecule precursors to synthesize nanomaterials through on-surface reactions

We demonstrate a microscopy technique that employs spin defects in hexagonal boron nitride as quantum sensors to perform magnetic and temperature imaging of van der Waals materials.

Talk based on a combination of Phys. Rev. X 12, 011007 and unpublished work.

Creating short pulses at mid-infrared (MIR) wavelengths has been an ongoing research area for several years because of the high applications potential. This talk will discuss different schemes for creating MIR ultrashort pulses in all-fibre configuration.

Optical fibers with NV(-) nanodiamonds embedded along the core are reported. Magnetic field sensing is validated along with nanodiamond concentration scaling and NV(-) fluorescence coupling to the guided modes.

Time and resource-efficient active machine learning approach has been used to create a database containing the functional and structural properties of millions of novel van der Waals layered structures.

In a thermal-loss channel, it is uncertain whether a discrete-variable or a continuous-variable quantum key distribution (QKD) protocol is more optimal. We investigate QKD protocols in a thermal-loss setting but with the assumed availability of perfect sources and detectors.

We study polymer melts via high precision Monte Carlo simulations of Hamiltonian paths of up to N = 100 million steps on the simple cubic lattice with periodic boundary conditions.

A novel fabrication methodology incorporating neon-ion milling is developed to engineer superconducting boron-doped diamond devices including the first diamond nano-SQUID, with noise properties (flux noise: 0.14 $\mu\phi_0$/$\text{$\sqrt{\text{Hz}}$}$ at 1 kHz, spin sensitivity: 11 spins/$\sqrt{\text{Hz}}$) comparable to optimal Nb-nano-SQUIDs reported.

A fiber based polarization insensitive OCT has been developed to remove polarization artefacts from conventional OCT images. The computational processing and hardware system calibrations will be discussed. A comparison of different polarization independent schemes and results will also be presented.

Recent developments have enabled the computation of hadron resonance properties from scattering amplitudes determined from lattice Quantum Chromodynamics. We summarise this theoretical approach and compare with recent data from hadron physics experiments.

Inducing forward Brillouin scattering (FBS) in non-suspended waveguides is challenging because the required acoustic waves have long wavelengths, typically exceeding the acoustic mode cutoff. Here, we investigate the extent to which an acoustic mode can be confined in non-suspended platforms.

We spatially resolve hyperfine spin properties of organic materials employed in OLEDs to reveal large intra-device variations exceeding 30% and find this property to be correlated on lengths up to 7 µm.

Ring resonators are used to produce injection-seeded, transform-limited pulsed lasers for remote sensing applications. Injection-seeding generally forces uni-directional operation. Our pulsed laser showed both directions were equally seeded. We developed a model that shows <0.1% forward-to-reverse-wave coupling can cause this.

The most common mechanism for entangled photon generation in optics is the second-order nonlinear process of spontaneous parametric down-conversion. I will provide a brief overview of recent developments in the area, moving from photonic chips to nanophotonics.

We describe a measurement and reconstruction method for performing optical magnetometry in an ultracold atomic vapour, making use of Hilbert transform-based FM demodulation to perform instantaneous retrieval of the Larmor phase and allowing calibration-free measurement of the field.

We explore the properties of uniform quasi-two-dimensional condensates with several interacting internal degrees of freedom, which we model in terms of a multi-component Gross-Pitaevskii equations in the rotating frame for a Bose-Einstein condensate in different experimentally realistic box geometries.

We present a high quality titanium doped sapphire whispering gallery mode (WGM) resonator with record low lasing threshold and high slope efficiency. We also show that amplification is readily achievable.

We demonstrate the possibility of significantly enhancing and precisely controlling the fluorescence of NV centres using plasmonic metal nanoparticles by developing the theoretical foundation for NV-plasmonic optical interaction (which is verified using existing optical measurements).

We developed an optical fibre containing fluorescent micron-sized diamonds. The nitrogen-vacancy defects inside diamonds make the fibre sensitive to external magnetic fields. I will discuss the fabrication process and the sensitivity we achieved.

Discrete modulated continuous variable quantum key distribution (CVQKD) performs better than Gaussian modulated CVQKD in low signal-to-noise-ratio (SNR) regimes. We present results on the study of its performance in a satellite-to-ground context in the asymptotic and finite-size limit.

Experimental results of high amplitude superfluid helium-4 waves and nonlinear phenomena including cnoidal waves, pulse trains and superfluid optomechanical dissipative solitons are presented, agreeing with the recently observed optomechanical dissipative solitons in solid state.

We experimentally demonstrate a quantum compressive waveform sensor. We reconstruct a synthesised neural magnetic waveform using an incomplete set of frequency measurements made by radio frequency dressed atoms. Reconstruction is achieved via convex optimisation.

III-Nitride material system has been utilized to obtain high-performance UV-A lasers. In this study, we focused on understanding the impact of waveguide thickness on the performance of 390 nm GaN laser diodes.

We demonstrate a truly reference-frame-independent quantum key distribution protocol utilising a 4-photon entangled state. We present our latest results showing how local and global rotational invariance makes this protocol immune to a jamming attack.

This work presents a precise technique to control fabrication of quantum emitters in hexagonal boron nitride (hBN) via electron irradiation. An annealing procedure for increased efficiency and link to well documented UV defect emission in hBN is also outlined.

We present simple and robust designs for optical fiber radiation sensors for dosimetry applications, by utilizing femtosecond laser micromachining.Furthermore, we examine the implementation of our technique with plastic scintillator (BCF-10) for medical radiotherapy dosimetry.

We present a highly tuneable terahertz (0.2THz) frequency selective absorber. The device is based on a graphene/gold bilayer which is patterned/etched into a cross-slot metamaterial structure. This provides high resonant quality from the gold and tuneability from the graphene.

A simulation of the process of electron energy deposition in molecular hydrogen in the energy range 0–500 eV is reviewed. Ionisation and dissociative effects are examined and a new numerical method for sampling continuum excitations is presented.

Coupling optical and mechanical modes of microresonators is usually engineered by harnessing their intrinsic nonlinear material response. We propose to harness a new coupling mechanism, in which relies an ensemble of nitrogen vacancies (NVs) induces the effective nonlinearity in diamon.

We developed an inverse design scheme to optimise the design of nonlinear metasurfaces for sum-frequency generation with any combination of optical wavelengths, achieving a high efficiency exceeding unpatterned films by several orders of magnitude.

This talk will outline a new approach to mitigating Brownian coating thermal noise in optical cavities using multiple higher-order gaussian modes. We will present results of a theoretical study into this new sensing scheme and plans for an experimental implementation.

We propose a Time Projection Chamber (TPC) to measure (e+e-) production from proton induced nuclear reactions. TPC measurements provide 200 times more sensitivity than previous experiments enabling world-leading limits for New Physics searches and novel Nuclear Physics investigations.

A discussion on utilising a dressed three level system as a magnetometer at ultra low frequencies, in the presence of dominating line noise.

Certified quantum randomness protocols can securely guarantee random numbers that are unpredictable to any physical observer. We experimentally implement one such protocol based on quantum steering using single photons.

A density functional theory investigation of cobalt-centred phthalocyanine active site tuning via atomic linker immobilisation for the CO2 electroreduction reaction. Electronic properties, geometries and free energy reaction pathways are calculated to determine the best performing systems.

In this work, we perform epitaxial growth and characterizations of AlGaInN alloys lattice-matched to GaN with four different compositions. The understanding of growth conditions and optical properties of AlGaInN alloys are essential for integration with GaN-based applications.

We implemented nanofabrication to obtain an on-chip optomechanical magnetometer integrated with off-the-shelf laser and photodetector. Here we show the fabrication process and performance of our sensor.

In this work, we aim to experimentally generate supercontinua in the mid-infrared region using the novel architecture of nonlinear amplification. This work is guided by simulations that utilize recently developed numerical models.

We present a numerical and analytical investigation of thermal noise processes in Brillouin experiments. We focus on Brillouin-based memory experiments, and explore the effects of noise on information retrieval for amplitude and phase-based storage with different pulse configurations.

We propose a novel approach for remote sensing and mapping of magnetic fields with high spatial resolution using NV nanodiamond layer deposited on an end-surface of an optical fiber or an imaging fiber bundle.

We propose and fabricate a static dielectric metasurface that enables single-shot characterization of the distinguishability between two photons with high transmission efficiency and tolerance to measurement noise.

We designed and deployed a novel compact Raman spectrometer to discriminate between original and imitation whisky, with ethanol concentrations measured to within 2% accuracy. This work has application potential in the liquor industry.

We present a laser-cooled rubidium focussed ion beam for use in nano-fabrication and imaging. We aim to achieve higher beam brightness and smaller focus spot sizes than gallium focussed ion beams.

We carry out a comprehensive survey of ab initio methods to predict the electronic band structure of Ag, graphene, and FeSe, and compare the results with ARPES data.

We theoretically investigate the performance of an interaction-driven many-body quantum heat engine with a working medium consisting of an experimentally realisable, harmonically trapped one-dimensional Bose gas, exploring the entire phase diagram.

A novel energy-efficient and high-performance MEMS-based mechanical switching structure with a suspended waveguide is investigated for developing the applications of high-speed optical communication networks, hyper-scale datacenter and data-intensive computing systems.

2D antimony doped indium oxide (IAO) nanosheets with few atom thicknesses have been synthesized utilizing liquid metal printing technique. The work proposes a viable pathway for realizing ultrathin transparent semiconducting oxides (TSOs) with enhanced electronic and optical properties.

This work focuses on the performance of different classical optimizers when used in variational quantum algorithms, specifically for applications in quantum chemistry, for example, evaluating the ground state energy, the dissociation energy, and the dipole moment of different molecules.

We have established a new Australian research laboratory dedicated for studies of gravitationally bouncing droplets of fluid. In this inaugural work we have created and observed long-lived and interacting time crystals.

In this work we present a unifying theory based on Green's function that realistically model waveguides talking into accounting finite size and boundaries. We then apply our formalism to experimentally study Atom-Photon Bound states in a rectangular waveguide QED system.

Quantum cascade lasers emitting frequency combs are of interest due to the variety of novel applications they could support. Here we present a numerical study about the self-generation of these combs in the terahertz region.

Measurement based quantum computing is an alternate formulation of quantum computing to the ubiquitous circuit model. Here we demonstrate how to generate algorithm specific graph states to implement arbitrary quantum circuits in this model.

Nonlinear properties of optical fibers are parasitic at high optical powers and can be manipulated by tuning the composition of the fiber core via the molten core method (MCM) for fiber fabrication.

At the TeV scale, low-energy precision observations of neutron characteristics provide unique probes of novel physics. Precision studies of neutron decay observables are susceptible to beyond the Standard Model (BSM) tensor and scalar interactions, while the neutron electric dipole moment, $d_n$, also has high sensitivity to new BSM CP-violating interactions. To fully utilise the potential of...

The molecular convergent close-coupling (MCCC) method is used to perform calculations of 10–1000 eV electrons scattering on the electronic and vibrational ground state of HeH+. Cross sections are presented for excitation of the n=2–3 singlet and triplet states and ionization.

We apply the coupled-mode theory to study the steady state of BECs loaded into the p-band of a 2D bipartite optical lattice potential. We demonstrate the possibility to create a superposition of Bloch states with a nontrivial orbital texture.

We characterise the emergence of vortex pairs in stationary solutions of superfluid flow past a finite obstacle, both analytically and numerically. We demonstrate how this leads to the breakdown of superfluidity at the critical velocity.

The relativistic convergent close-coupling method was applied to calculate a comprehensive collision dataset for electron scattering from atomic tin. Elastic, excitation and ionisation cross sections are presented for the ground and low-lying excited states.

In this work, DFT analysis is employed to study the structural evolution of ternary III-oxides, such as (InxAl1-x)2O3, (AlyGa1-y)2O3, and (GazIn1-z)2O3, determining the compositions at which phase transitions occur and important physical parameters.

Some new developments and lessons learned in the automated calibration system for the Belle II experiment over the past two years.

This work explores the potential of convolutional neural network to directly decode information encoded in the nonlinear Fourier domain under the influence of carrier frequency offset and carrier phase offset.

Determination of transition polarisability for atomic parity violation in cesium.

We present a novel design of optical phantom using metal-ion doped glass-ceramics. Comprising crystalline structure and nickel ion in the glass matrix, this glass-based optical phantom can mimic the optical properties of human tissues with excellent optical homogeneity and stability.

We present a topology-optimised metasurface design for ultra-compact and light-weight space-based polarimetry, allowing for five parallel polarisation measurements across the moving image strip, to facilitate applications including water glint removal.

Results from the Koala, Taipan and Sika instruments at the OPAL reactor, ANSTO, reveal two martensitic transformations for an Fe-30at%Pd crystal between 400 to 100K. These results will be discussed in this poster presentation.

We motivate a dark matter model correction, due to the sun's gravity, in which direct detection experiments are expected to exhibit a non-sinusoidal signal. We also explore the dark sector consisting of more than one distinct mass component.

A high $Q$-factor whispering-gallery mode resonator was fabricated of yttrium lithium fluoride, furthermore an independent measurement of the coupler separation distance was explored for beam alignment and in probing the evanescent field between our couplers.

We model the dynamics of nanomechanical oscillator coupled to single electron transistor using the nonlinear Fokker-Planck equation in the regime where transport is fast compared to mechanical dynamics. The calculations are compared with recent experimental results.

We study the effect of the inorganic semiconductor substrate on the exciton binding energies in the crystalline tetracene and its implications for the singlet fission effect.

We show a theoretical analysis of second-order nonlinearity in unpoled SiN strip-loaded LNOI waveguides with bound states in the continuum predicting a conversion efficiency of 1000% W-1 cm-2.

We present our recent results on the electrical detection of coherent spin manipulation of spin-dependent recombination in a silicon carbide pn-junction device at room temperature via pulsed electrically detected magnetic resonance.

We use dynamical mean-field theory in conjunction with density functional theory and time-dependent Ginzburg-Landau formalism to investigate the electronic properties of the charge density wave (CDW) material 1T-TiSe$_{2}$ to better understand the formation and melting of the CDW state.

We present a powerful theoretical framework, organized as user-friendly open-source tool, for exploring image formation in confocal microscopes when using non-linear fluorophores. It allows extremely convenient image optimization and enables the unraveling and exploration of unexpected and exotic imaging phenomena.

Using a superfluid helium third-sound resonator, we engineer the dynamical backaction from entropic forces, applying it to achieve optomechanical phonon lasing with a threshold power of only 2 picowatts, a factor of 2000 lower than has been shown before.

We use polarisation resolved photoluminescence to reveal enhanced valley polarisation of excitons on a ferromagnetic substrate. This indicates energetic splitting of the valleys induced by the magnetic field and potential magnetic exchange interactions.

Gold and Silver Nanoparticles and N-Graphene Quantum Dots (N-GQDs) were used for NELIBS. 199% and 208% of signal improvements were reached with Au and Ag nanoparticles. In N-GQDs case, 79% of signal improvement was reached.

We propose the use of charged, massive particle interferometers to probe for new or modifications to known forces at close range. We consider such a devices ability to detect Yukawa style modifications to gravity and the electromagnetic interactions.

Recent measurements of W mass and muon gyromagnetic anomaly disagree with the Standard Model. Both are reconciled by a preon model, with tension under 0.5 sigma and first-principles prediction of W and Z masses.

Exciton dynamics in organic semiconductors, such exciton transport and spin-mediated spectral conversion. Theoretical modelling and experimental interpretation using Markovian and non-Markovian quantum master equations. Dynamics, Steady-state solution and departure from Markovianity.

Stiblaistion of metal clusters in the surface by adding an overlayer of metal oxide using ALD, it is expected to prevent the agglomeration and stabilise metal clusters on the surface for applications in catalysis, photocatalysis, medical devices, and sensors.

A pressure-sensitive microstructured optical multimode fibre is used to build a hydrophone using a homodyne detection configuration. The fibre hydrophone is tested again a commercial piezo-electric hydrophone and shows similar performance across the whole audio frequency band.

The DFSZ axion, which solves the Strong CP problem, suffers from a cosmological domain wall problem. In this talk, I provide a catalogue of domain-wall-free DFSZ-like axion models by modifying the structure of the Yukawa couplings based on symmetry principles

We want to analyse the fluctuation theorem in the context of a two-dimensional vortex matter system.

Reporting on the development of next-generation guide star laser technology using diamond Raman laser that aims to increase power, provides frequency stabilization, and narrow laser linewidth required for guide star applications.

The ITER and JET fusion reactors use beryllium-containing materials in plasma facing wall components. We calculate integrated total and state-selective electron-capture cross sections for Be$^{4+}$ collisions with excited states of atomic hydrogen using the wave-packet convergent close-coupling method.

We develop a radar scattering theory for time-varying surfaces with anisotropic dispersion relations, and apply it to the problem of remote sensing of flows generated by internal gravity waves in the ocean.

We demonstrate laser Doppler velocimetry to a moving airborne drone at a distance of 600 m, achieving an in-line velocity precision of 2 nm/s with 10 seconds of averaging.

We present a new approach to analysing homodyne measurement using Schrödinger-cat states as local-oscillators and give the characteristics of this type of measurement for various different input states.

In this work we obtain images using an Optical Laser Scanning system. Scanning is performed with a laser beam (375 nm) through a 100X microscope objective, the sample is in an XY translation stage (~ 20 nm by step).

The processing of UV curable resin for manufacturing 3D fibre preforms based on DLP technology has been investigated. Fibre preforms with higher silica loading have been successfully fabricated.

We propose a new measure of information flow in non-unitary quantum cellular automata which defines an equivalence class of open quantum systems that are coupled to an environment and are invariant in time and space.

We characterise near-IR to telecom frequency conversion via four-wave mixing in a rubidium-filled hollow-core fibre to allow for information transfer between efficient quantum memories within a fibre-based quantum network.

Modern surface micromachined optical MEMS commonly use electrostatic means to achieve mechanical actuation and often require a closed feedback loop to maximize tuning accuracy. Our method enables MEMS membrane displacement measurement without device modifications.

NMI participates in international inter-laboratory comparisons (ILCs) supporting development of standards for graphene and 2D materials. This presentation highlights the technical challenges of the accurate measurement and characterisation of these materials with Atomic Force Microscopy.

We report the investigation of extrusion die and glass billet parameters on the loss of tellurite fibre. The billet surface quality was found to be critical to achieve low fibre loss.

We present ‘tilt locking’ as a potential candidate for laser stabilisation for space applications and demonstrate the performance at stabilization limits near the standard RF approaches.

In the context of Distributed Quantum Computing,this work demonstrates the impediments on the usage of satellites for distributing entanglement between two error-corrected quantum computers on earth separated by varying distances.

Recent developments in several fields require high power narrow linewidth lasers. Here, we measure the linewidth of a high power, single frequency DRL. We furthermore propose as a novel static frequency control mechanism, with speeds comparable to piezo-electric devices.

One key challenge in the search for new Topological Insulators (TI) is their characterization. Through theoretical modelling, we identify a method to improve the magnetic monopole response of TI which can be used to rapidly characterize the properties of TIs.

We demonstrate the use of a ring-shaped Bose-Einstein condensate as a rotation sensor by measuring the interference between two counter-propagating phonon modes.

Micro Electro-Mechanical Systems (MEMS) based Fabry Perot interferometers offer low size, weight, and power (SWaP) platforms for carrying out spectroscopic and chemical/biological sensing while being mechanically robust and field-portable unlike traditional bulk-optics based techniques.

We use an improved numerical model to demonstrate the advantages in terms of increased average power and spectral broadening while generating a supercontinuum using a nonlinear amplifier over the traditional method of using an amplified pulse seeding a passive fibre.

The molecular convergent close coupling method was applied to study the ionisation of molecular hydrogen and its isotopologues from various electronic states. Vibrationally-resolved cross sections are presented and compared with data from literature.

Our project demonstrates two types of monolithic SiC metalenses, a Conventional one and an extended focal length one, to capture light from quantum emitters embedded close to the surfaces of the monocrystalline SiC material.

We present the first, to our knowledge, Monte Carlo model of Raman scattering in the water column under pulsed laser excitation, and will compare and contrast the characteristics of elastic and Raman returns.

We demonstrate a hybrid quantum-semiclassical multi-scale modeling approach to characterize degenerately phosphorus-doped in-plane contacts and their impact on the energy states of the precision placed donor quantum dots under different bias conditions in silicon STM devices.

Presented is the concept of creating inertial force by the field theory. Provided is the candidate equation that describes inertial force by that field and the experiment that can test the new concept

We report results for the transcorrelated method applied to multicomponent quantum gases. We discuss applications of our methods to few atom systems that are achievable in experimental setups, as well as to liquid droplets and heavy impurities in quantum gases.

We perform fully non-linear simulations of cosmological weak gravitational lensing and extract observables that will be probed by the next generation of large scale structure surveys.

We develop a non-perturbative description of spontaneous parametric down-conversion in the high-gain regime for nanostructured systems with arbitrary amounts of loss and arbitrary dispersion. As an example, we use it numerically to investigate integrated quantum spectroscopy at high gain.

The detection of kilohertz-band gravitational waves promises discoveries in astrophysics, exotic matter, and cosmology. We study how to theoretically improve future interferometric gravitational-wave detectors' kilohertz-band sensitivity which is limited by quantum noise.

Demonstration of a novel multi-pass approach to ultra-fast laser inscribed waveguide fabrication, which improves optical mode confinement and reduces bend losses for small radii of curvature, enabling more compact photonic integrated circuits and greater integration density.

This work studies the phase and structural evolution of Yb-doped alkaline earth fluoride nanoparticles in silica-based optical fiber during thermal treatments in fiber fabrication. This knowledge will aid in understanding and tailoring the optical properties in the resultant fibers.

We study the query complexity of determining if a graph is connected with global queries. By following the template of l0-samplers, we construct quantum algorithms solving graph connectivity in several global query models.

We employ high quality-factor nano resonators coated with metal-organic frameworks to obtain high sensitivity and selectivity towards a specific VOC. In this work, we have demonstrated a LOD of 400 ppm in ambient conditions which aids to test hyperglycaemic condition.

Phase cameras are wavefront sensors which measure the transverse amplitude and phase of specific frequency components of optical fields. In this presentation we discuss a new all optical phase camera design and give an overview of previous and ongoing applications.

We develop optimal measurement and control strategies for spectator-qubits(SQ) to mitigate data-qubit dephasing caused by a random telegraph process. Our findings show that the SQ, like Dynamical Decoupling and Quantum Error Correction, may effectively increase the coherence of the data-qubit.

2P:1P multidonor quantum dot EDSR qubit model, optimizing spin rotation and coherence. The model accounts for complete understanding of what impact qubit geometry and nearby charge defects have on the electrical operation and noise properties.

New insight into the quark mass dependence of octet baryon magnetic polarisabilities is created by confronting lattice QCD with a constituent quark model description of fractionally charged baryons where individual quark sector contributions are isolated.

A 215 mW single-frequency thulium-doped ring-cavity fiber laser operating at 2050 nm based on Tm/Ho-codoped fiber saturable absorber has been proposed and experimentally demonstrated for the first time.

We show how one can use phase-space represenations of quantum mechanics to compare theoretical and experimental outputs of linear bosonic networks. These methods are applied to data from recent large scale experiments of a Gaussian Boson Sampling quantum computer.

We have investigated the preferential coupling of the nanodiamond into the guided-modes of a step-index fibre. To explore the possibility of long-distance magnetic field sensing we have also modelled the coupling efficiency of splicing diamond-doped fibres to commercial SMF-28e fibres.

Quantum approaches to the binary paint shop problem – an optimisation challenge in the automotive industry – are investigated. We benchmark the quantum approximate optimisation algorithm and its recursive variant against classical heuristics and exact solvers

Here we describe our work on the development of a precision vector quantum diamond magnetometer (QDM). We will also discuss future opportunities for engineering quantum-grade diamond materials for precision magnetometry applications here in Australia.

Quantum Machine Learning is an exciting prospect emerging from the recent advances in Quantum Computing. The ability to derive a quantum advantage over classical algorithms is paramount and this paper explores methods based on quantum kernels to realise this advantage.

Measurement and control of massive mechanical oscillators in the quantum regime is now possible [Nature 556, 478 (2018); Science 372, 625 (2021)]. I will describe this work and the possibilities it enables for sensing with non-classical mechanical systems moving forwards.

We present a quantum theory of a one dimensional optically levitated mirror. We consider the resulting entanglement between the mirror and cavity field and squeezing in the mirror output. We consider the visibility of this entanglement and thermal effects.

We investigate a scheme for microwave-to-optical transduction using atomic three-level systems. Using quasi-degenerate perturbation theory we derive an effective Hamiltonian description for the conversion process. We find that the conversion is limited by off-resonant effects like unintended biphoton emission.

In this work we study quench dynamics within the extended Su-Schrieffer-Heeger model. Specifically we consider the question if there is a quench between two topological states does the "path" of the quench impact the survival of the initial state.

We consider harmonically trapped systems of two and three bodies interacting via a contact interaction and present semi-analytic calculations of time-dependent observables, Ramsey signal and particle separation, following a quench in s-wave scattering length.

A brief survey of recent B-physics studies with the ATLAS detector at the LHC, concentrating on tests of the standard model of particle physics.

Reconstruction techniques with the aid of ray tracing are investigated for a custom-built OPT system operated without applying index matching material to strongly refracting objects.

Here we report the research of real-time fluorescence monitoring during the creation of NV color centers in diamond using a femtosecond laser.

In quantum metrology in the presence of noise, we show that using multi axis control leads to better than SQL scaling, and can even recover Heisenberg scaling under appropriate conditions.

High temperature sustainability of a new class of Bragg gratings referred to as regenerated polymer optical fiber Bragg gratings (RPOFBGs) in ZEONEX-based polymeric fibers are explored and integrated with cochlear implants to aid surgical navigation.

We demonstrated of a multimode fibre specklegram sensor for noninvasive respiratory rate monitoring on a hospital mattress using deep learning.

We theoretically investigate the wavepacket dynamics in a non-Hermitian, optically anisotropic exciton-polariton system and observe their self-acceleration. We also describe the formation of pseudospin topological defects in momentum space.

This study analyses the temperature-dependent spin and optical properties of hexagonal boron nitride (hBN) nanopowders, which show a complex profile in optically detected magnetic resonance (ODMR) that may be exploited as a sensitive temperature sensor.

We use static and time-dependent mean-field approaches to investigate and compare the shell effects affecting fragment formation in both fission and quasifission.

The project is regarding the mapping silicon test mass birefringence using an automated system. The measurement is based on a polarization modulation technique using a PEM. Our system can measure small Birefriengence of 10^-9.

Detection of simulated failures in underground power cables using Multimode fibers. Failure in underground power cable couases overheat (hot-spot), and locating the problem is difficult. Detection is achieved through Distributed Temperature Sensors that use RAMAN-based measurements for high-precision temperature detection.

The High-Luminosity Large Hadron Collider is due to come online sometime in 2028, posing new challenges to the ATLAS detector. The new Inner Tracker is simulated to check hardware and software expectations are met and understood.

To observe Maxwell’s demon in our trapped Yb ion proof-of-concept experiment, a high finesse, high absolute transmission efficiency Fabry-Perot optical cavity is being developed to resolve < MHz scale shifts of single photons.

Third (THG) and one-third harmonic generation (OTHG) have not been used practically despite their unique potential for various applications due to challenging phase matching conditions. Here we propose a stepladder scheme allowing efficient THG and OTHG from spontaneous processes.

The study theoretically investigates outer valence molecular orbitals in the isomerization of of norbornadiene and quadricyclane. Through space interaction of NBD is confirmed as the next highest occupied molecular orbital (10a1) of NDB.

I will describe a bifurcating entanglement renomalization group flow that is based on the critical (1+ 1) D Ising model and go on to show that this defines a tensor network state with some unusual correlation function behaviour.

We investigate wavefront shaping in a multi-mode fibre amplifier to achieve simultaneous suppression of SBS while maintaining a high output beam quality

We use symmetry analysis of metasurfaces on thin film to determine the vector field profiles of the modes and thus calculate coupling to radiation channels, mode overlaps and the nonlinear polarisation of sum frequency generation.

We study how impurity atoms can be trapped within superfluid vortices in a two-component BEC. This leads to distorted vortex profiles and a mass-dependent splitting of the impurities energy. The excited states of the impurity show effects analogous to chemistry.

The System for Toxic Element Analysis (STELA) is a new novel instrument designed for the measurement of toxic elements at significantly improved detection limits using highly advanced X-ray optics in conjunction with X-ray fluorescence analysis.

Taipan is the highest flux, thermal neutron scattering instrument at ANSTO, Australia. This poster will present some recent scientific highlights at Taipan – both as a triple axis spectrometer, and a Be-filter analyser spectrometer.

Preliminary results on the generation of hydrogen and methane from Australian wheat straw.

In this work we present our all-fiber fanout technology and the results of its evaluation. The broadband, low-loss components were tested for optical, environmental and mechanical performance showing high maturity and readiness for field deployments.

We study steerabilities of various $n$-party 2-producible entangled states. Most strikingly, a state produced from a single 2-qubit state allows one party shared a qubit from entangled state to steer any one of the n-1 otherparties for arbitrarily large $n$.

We present a novel atom interferometry scheme that allows readout-delay-free measurement by extracting phase information from overlapped spatial fringes to measure gravity on compact devices using Bragg pulses.

We introduce a semi-empirical microscopic model of spin crossover materials combining crystal field theory with elastic intermolecular interactions. We investigate the interplay of single site and collective physics of SCO materials. We demonstrate a realistic route to room temperature switching.

This work presents a surface micromachined long-wave infrared tunable Fabry–Pérot interferometer (FPI) incorporating Ge/BaF2/Ge solid-material distributed Bragg’s reflectors (DBRs) for 8–10 µm optical wavelength range. This work also represents a reliable and reproducible fabrication process for tunable cavity LWIR FPIs.

The optical and chemical properties of the magnetic nanofluid can be altered using a magnetic field. The magnetic nanofluid shows tunability in the diffraction angle under a magnetic field. Hence, magnetic nanofluid is the potential candidate to prepare soft grating.