Manipulating the nonreciprocal microwave transmission by using a pump-induced magnon mode

We realize the electromagnetic regulation of nonreciprocal microwave transmission by introducing a pump-induced magnon mode (PIM) into a cavity magnonic device with dissipative photon–magnon coupling. As a peculiar spin wave, the PIM's dynamic properties, including its spin number and resonant...

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Bibliographic Details
Published in:Applied physics letters 2024-07, Vol.125 (4)
Main Authors: Chen, Zhijian, Rao, Jinwei, Zhao, K. X., Yang, Fan, Wang, C. X., Yao, Bimu, Lu, Wei
Format: Article
Language:English
Subjects:
Coupling
Data processing
Dissipation
Dynamic characteristics
Magnons
Microwave transmission
Photons
Resonant frequencies
Spin dynamics
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Summary:We realize the electromagnetic regulation of nonreciprocal microwave transmission by introducing a pump-induced magnon mode (PIM) into a cavity magnonic device with dissipative photon–magnon coupling. As a peculiar spin wave, the PIM's dynamic properties, including its spin number and resonant frequency, can be easily tuned by the microwave pump. Hence, it facilitates the precise control of the coupling process between the PIM and the cavity magnonic device by regulating the pump signal. Along with these manipulations, the nonreciprocal microwave transmission produced by the dissipative photon–magnon coupling is regulated without reconfiguring the system. In the experiment, we achieve a pump-controlled nonreciprocal bandwidth of 16 MHz and a pump-tunable isolation range of up to 40 dB. Our work demonstrates the control of a microwave with another microwave. It has a great potential in the design of fast microwave switches and programmable isolators for information processing.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0189615