Temperature controlled magnon–photon coupling in a YIG/GGG-superconducting cavity coupled system

To explore potential applications in classical and quantum information transfer, the hybrid systems between yttrium iron garnet (YIG) and cavities have been extensively studied, and four coupling regimes have been defined based on the relative strength between the coupling strength and dissipation r...

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Published inJournal of applied physics Vol. 134; no. 12
Main Authors Zhao, Yue, Sun, Yitong, Wu, Zhenfa, Chen, Yanxue, Tian, Yufeng, Yan, Shishen, Bai, Lihui
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 28.09.2023
Subjects
Applied physics
Coupling
Dissipation
Gadolinium
Gadolinium-gallium garnet
Holes
Hybrid systems
Information transfer
Iron
Magnetic permeability
Magnons
Microwave transmission
Photons
Quantum phenomena
Substrates
Subsystems
Superconductivity
Temperature dependence
Thick films
Yttrium-iron garnet
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Summary:To explore potential applications in classical and quantum information transfer, the hybrid systems between yttrium iron garnet (YIG) and cavities have been extensively studied, and four coupling regimes have been defined based on the relative strength between the coupling strength and dissipation rate of each subsystem. Achieving the control of magnon–photon coupling between nano-thick YIG films and cavities remains to be explored. We experimentally measure the microwave transmission spectra of a nano-thick yttrium iron garnet/gadolinium gallium garnet (YIG/GGG) film coupled to a superconducting cavity at different temperatures. The dissipation rate of the superconducting cavity increases significantly with decreasing temperature, which is influenced by the temperature-dependent magnetic susceptibility of the GGG substrate. Accompanied by the temperature-dependent magnon dissipation rate, a continuous transformation of the coupled system in strong coupling, Purcell and weak coupling regimes is achieved.
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ISSN:0021-8979
1089-7550
DOI:10.1063/5.0160117