Meter-scale strong coupling between magnons and photons
- URL: http://arxiv.org/abs/2303.10925v3
- Date: Thu, 10 Aug 2023 02:08:12 GMT
- Title: Meter-scale strong coupling between magnons and photons
- Authors: Jinwei Rao, C. Y. Wang, Bimu Yao, Z. J. Chen, K. X. Zhao, and Wei Lu
- Abstract summary: We experimentally realize a meter-scale strong coupling effect between magnons and photons at room temperature.
We integrate a saturable gain into a microwave cavity and then couple this active cavity to a magnon mode via a long coaxial cable.
- Score: 4.583945605910229
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: We experimentally realize a meter-scale strong coupling effect between
magnons and photons at room temperature, with a coherent coupling of 20 m and a
dissipative coupling of 7.6 m. To this end, we integrate a saturable gain into
a microwave cavity and then couple this active cavity to a magnon mode via a
long coaxial cable. The gain compensates for the cavity dissipation, but
preserves the cavity radiation that mediates the indirect photon-magnon
coupling. It thus enables the long-range strong photon-magnon coupling. With
full access to traveling waves, we demonstrate a remote control of
photon-magnon coupling by modulating the phase and amplitude of traveling
waves, rather than reconfiguring subsystems themselves. Our method for
realizing long-range strong coupling in cavity magnonics provides a general
idea for other physical systems. Our experimental achievements may promote the
construction of information networks based on cavity magnonics.
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