Tuning magneto-optical zero reflection via dual-channel hybrid magnonics
- University of North Carolina at Chapel Hill, NC (United States)
- University of Wisconsin-Madison, WI (United States)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- University of North Carolina at Chapel Hill, NC (United States); North Carolina A&T State University, Greensboro, NC (United States)
- North Carolina A&T State University, Greensboro, NC (United States)
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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