2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

25 - Level Attraction and Synchronization in Hybridized Magnon-Photon Systems

4 Jun 2019, 16:45
2m
SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

SWH 9082 + AQ South-East Corner / coin sud-est

Simon Fraser University

Poster (Non-Student) / Affiche (Non-étudiant(e)) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) DCMMP Poster Session & Student Poster Competition Finals (10) | Session d'affiches DPMCM et finales du concours d'affiches étudiantes (10)

Speaker

Dr Michael Harder (Department of Physics, Kwantlen Polytechnic University)

Description

The recent emergence of cavity-spintronics [1] has garnered intense interest from both the quantum information and spintronics communities, the former inspired by the enhanced coherence rates of ferromagnetic systems and the latter motivated by new avenues for spin current control. Indeed myriad technological developments have already been revealed, such as novel memory architectures [2], microwave to optical frequency conversion techniques [3] and non local spin current manipulation [4]. These developments have all been based on the fact that, due to the hybridization between microwave cavity photons and magnetic excitations, cavity-spintronic devices act as excellent transducers. More specifically, spin-photon hybridization manifests itself as level repulsion due to electrodynamic phase correlation between the spin and photon subsystems, and is characterized by the emergence of a gap in the eigenspectrum [5]. Interestingly, in analogue cavity optomechanic systems another form of hybridization, level attraction, also exists [6], which is deeply connected to the physical ideas of exceptional points, PT symmetry and synchronization. In this talk I will discuss our recent observation of level attraction in a coupled spin-photon system [7]. This new form of coupling is characterized by synchronization-like behaviour of the hybridized modes, and originates in a novel cavity-Lenz effect which leads to a dissipative interaction. The cavity-Lenz effect occurs independently of dissipation rate or interaction strength and it is even possible to perform continuous in-situ tuning between level attraction and level repulsion. Therefore the discovery of level attraction in hybridized magnon-photon systems paves a new path for utilizing light-matter coupling in cavity-spintronic and quantum magnonic applications, while at the same time providing a new playground for the exploration of many intriguing physical ideas.

[1] M. Harder and C.-M. Hu, Solid State Physics 69, 47 - 121 (2018).
[2] X. Zhang et al., Nat. Comm. 6, 8914 (2015).
[3] R. Hisatomi et al., Phys. Rev. B 93, 174427 (2016).
[4] L. Bai, et al., Phys. Rev. Lett. 118, 217201 (2017).
[5] L. Bai, et al., Phys. Rev. Lett. 114, 227201 (2015).
[6] N. Bernier et al., Phys. Rev. A 98, 023841 (2018).
[7] M. Harder, et al., Phys. Rev. Lett. 121, 137203 (2018).

Primary authors

Dr Michael Harder (Department of Physics, Kwantlen Polytechnic University) Ms Ying Yang (Department of Physics and Astronomy, University of Manitoba) Dr Bimu Yao (State Key Laboratory of Infrared Physics, Chinese Academy of Sciences) Dr Chenhui Yu (Jiangsu Key Laboratory of ASIC Design, Nantong University) Mr Jinwei Rao (Department of Physics and Astronomy, University of Manitoba) Dr Yongsheng Gui (Department of Physics and Astronomy, University of Manitoba) Dr Robert Stamps (Department of Physics and Astronomy, University of Manitoba) Dr Can-Ming Hu (Department of Physics and Astronomy, University of Manitoba)

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