Open AccessLevel attraction and level repulsion of magnon coupled with a cavity anti-resonance
Author(s) -
J. W. Rao,
Chenhui Yu,
Yutong Zhao,
Y. S. Gui,
Xiaolong Fan,
Desheng Xue,
C.M. Hu
Publication year - 2019
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/ab2482
Subject(s) - magnon , physics , coupling (piping) , resonance (particle physics) , dissipative system , phase (matter) , condensed matter physics , microwave , mode coupling , dispersion (optics) , quantum mechanics , quantum electrodynamics , mechanical engineering , ferromagnetism , engineering
We report on coherent and dissipative coupling between a magnon mode and an anti-resonance of transmission in a cylindrical microwave cavity. By effectively suppressing coherent coupling, we observe the hybridized dispersion to change from level repulsion to level attraction. A careful examination reveals distinct differences in the line shape and phase evolution of transmission spectra between these coupling behaviors. For a quantitative understanding of the interactions between the magnon mode and the cavity anti-resonance, we develop a model which precisely describes our experimental observations, particularly, the signature in the line shape and phase of the microwave transmission. Our work sets a foundation for understanding strong coupling between magnon modes and cavity anti-resonances. In addition, it also confirms the ubiquity of level attraction in coupled magnon-photon systems, which may be helpful to develop future magnon-based hybrid quantum systems.