High-end microwave systems rely heavily on oscillators with minimal phase noise. The research work introduces a novel method to decrease phase noise by employing a gain-driven polariton platform. Through coherent coupling-induced mode hybridization, frequency distribution around the carrier signal is effectively suppressed.
The approach to achieve minimal phase noise performance will be...
Erbium is one element in the globally-recognized class of critical minerals, the rare earth elements (REE’s). It is an essential component in various clean energy and modern technology applications from nuclear control rods to infrared optics. Growing demand for these high-tech applications alongside geopolitical supply chain risks underscore the critical status of REE’s. To address this, it...
Despite its outstanding electronic properties, silicon has limited light emission capabilities due to its indirect bandgap. However, Si quantum structures (Si-QSs) exhibit light emission through quantum confinement. In this project, we investigate the co-implantation of silicon and germanium to create SiGe quantum dots (QDs). The relative concentration of Ge has a direct influence on the...
Composition and optical properties of ion beam fabricated SiGeSn layers in Si (001)
A.W. Henry a, C.U. Ekeruche a, P.J. Simpson b, L.V. Goncharova a
*a Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada, N6A 3K7
b Department of Computer Science, Mathematics, Physics, and Statistics, University of British Columbia, Okanagan Campus, Kelowna,...
Transition Metal Dichalcogenides (TMDs) are layered semiconducting materials of the form MX$_2$, where M represents a transition metal atom and X represents a chalcogen. In the 1T structural phase, the chalcogens provide an octahedral environment for each metal atom. We propose a quantum loop model to explain the nature of bonding in these materials. We focus on metal atoms from group VI of...
In 2010 Sau $et~al$ proposed a topological superconducting Majorana fermions can be realized in a semiconductor
quantum well coupled to an $s$-wave superconductor and a ferromagnetic insulator. In the same year, Alica, proposed a simpler architecture for detecting Majorana fermions by applying an in-plane magnetic field to a (110)-grown
semiconductor coupled only to an $s$-wave...
We present an open-source API and software package called SymPhas for defining and simulating phase-field models, supporting up to three dimensions and an arbitrary number of fields. SymPhas is the first of its kind to offer complete flexibility in user specification of phase-field models from the phase-field dynamical or free energy equations, allowing the study of a wide range of models with...
High-harmonic generation (HHG) and attosecond scale physics are important areas of current research, combining aspects optical, atomic, molecular, and condensed matter physics. In the past decade, the study of HHG has been extended from atomic gases to solids. HHG in solids does not follow the behaviour of atomic gas HHG due to the added complexity of bulk inter-atomic interaction, and this...
Biomolecular self-assembly lies at the very heart of the function of living cells, where it organizes individual components into functional biological machines. The macromolecular sub-units typically correspond to proteins, whose shapes have been optimized over millions of years of evolution to ensure a proper functionality of the self-assembled structures. However, in pathological cases,...
Despite more than 25% power conversion efficiency (PCE) of organic-inorganic metal halide perovskite (HOIP), it remains a significant challenge to improve the long-term environmental stability, which hinders their further commercial application. Two-dimensional (2D) perovskite, originating from 3D perovskite structures, can be tuned by atomic scales, leading to electronic band structure...
Hybrid organic-inorganic metal halide perovskite have bypassed the power conversion efficiency (PCE) of silicon photovoltaics since it emerged ten years ago. Because of their easy processing and fabrication under ambient environment, it is a promising next generation photovoltaic technology. To further improve PCE, one of the practical approaches is to include the use of organic material,...
