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Tuning magneto-optical zero reflection via dual-channel hybrid magnonics

Journal Article · · Physical Review Applied
DOI:https://doi.org/10.1103/hs61-7hx4· OSTI ID:2588845
Multichannel coupling in hybrid systems makes an attractive testbed not only because of the distinct advantages entailed by each constituent mode but also because the opportunity to leverage interference among the various excitation pathways. Here, via combined analytical calculation and experiment, we demonstrate that the phase of the magnetization precession at the interface of a coupled yttrium iron garnet (YIG)/permalloy (Py) bilayer is collectively controlled by the microwave photon field torque and the interlayer exchange torque, manifesting a coherent, dual-channel excitation scheme that effectively tunes the magneto-optical spectrum. Furthermore, the different torque contributions vary with frequency, external bias field, and type of interlayer coupling between YIG and Py, which further results in destructive or constructive interferences between the two excitation channels, and hence selective suppression or amplification of the hybridized magnon modes.
Research Organization:
University of North Carolina at Chapel Hill, NC (United States); University of Wisconsin-Madison, WI (United States)
Sponsoring Organization:
U.S. National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0020145; SC0022060
OSTI ID:
2588845
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 3 Vol. 24; ISSN 2331-7019
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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