Lecture image placeholder

Premium content

Access to this content requires a subscription. You must be a premium user to view this content.

Monthly subscription - $9.99Pay per view - $4.99Access through your institutionLogin with Underline account
Need help?
Contact us
Lecture placeholder background
VIDEO DOI: https://doi.org/10.48448/3cas-3t98

technical paper

MMM 2022

November 07, 2022

Minneapolis, United States

Bistability in Dissipatively Coupled Cavity Magnonics

Dissipative coupling of resonators arising from their cooperative dampings to a common reservoir induces intriguingly new physics such as energy level attraction. In this study, we report the nonlinear properties in a dissipatively coupled cavity magnonic system. A magnetic material YIG (yttrium iron garnet) is placed at the magnetic field node of a FabryPerot-like microwave cavity such that the magnons and cavity photons are dissipatively coupled. Under high power excitation, a nonlinear effect is observed in the transmission spectra, showing bistable behaviors. The observed bistabilities are manifested as clockwise, counterclockwise, and butterfly-like hysteresis loops with different frequency detuning. The experimental results are well explained as a Duffing oscillator dissipatively coupled with a harmonic one and the required trigger condition for bistability could be determined quantitatively by the coupled oscillator model. Our results demonstrate that the magnon damping has been suppressed by the dissipative interaction, which thereby reduces the threshold for conventional magnon Kerr bistability. This work sheds light upon potential applications in developing low power nonlinearity devices, enhanced anharmonicity sensors and for exploring the non-Hermitian physics of cavity magnonics in the nonlinear regime.
1 H. Pan, Y. Yang and Z.H. An, arXiv:2206.01231 (2022) 2 P. Hyde, B. M. Yao, Y. S. Gui, Phys. Rev. B 98, 174423 (2018)

FIG. 1. (a) Illustration of the experimental setup, where a YIG sphere is imbedded in an assembly cavity. (b) Transmission coeffcient mapping of the hybridized cavity-magnon system. (c) Dispersion relation of hybridized cavity and magnon mode, where points A and E indicate off-resonance, and point C indicates on-resonance, and points B and D indicate intermediate frequencies. (d) The fixed field cut of transmission coeffcient mapping at the coupling condition.

FIG. 2 The jump position of field foldover hysteresis versus P at cavity frequencies (a) A, (b) B, (c) C, (d) D, (e) E. Purple (blue) circle symbols are experimental results of forward (backward) H field sweeping. The yellow and cyan solid curves are fitted. (f) The threshold for coherent and dissipative coupling system when off- and on-resonance. The threshold for coherent coupling is from Ref. 2.


Transcript English (automatic)

Next from MMM 2022

Asymmetric Magnetic Proximity Interactions in Ferromagnet/Semiconductor van der Waals Heterostructures
technical paper

Asymmetric Magnetic Proximity Interactions in Ferromagnet/Semiconductor van der Waals Heterostructures

MMM 2022

Scott Crooker and 3 other authors

07 November 2022

Stay up to date with the latest Underline news!

Select topic of interest (you can select more than one)


  • All Lectures
  • For Librarians
  • Resource Center
  • Free Trial
Underline Science, Inc.
1216 Broadway, 2nd Floor, New York, NY 10001, USA

© 2023 Underline - All rights reserved