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Updated: Dec 13, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Probing magnon-magnon coupling in exchange coupled Y Fe O /Permalloy bilayers with magneto-optical effects
Yuzan Xiong1,2, Yi Li3, Mouhamad Hammami1
1Department of Physics, Oakland University, Rochester, MI 48309 USA.
Abstract:
We demonstrate the magnetically-induced transparency (MIT) effect in YFeO(YIG)/Permalloy (Py) coupled bilayers. The measurement is achieved via a heterodyne detection of the coupled magnetization dynamics using a single wavelength that probes the magneto-optical Kerr and Faraday effects of Py and YIG, respectively. Clear features of the MIT effect are evident from the deeply modulated ferromagnetic resonance of Py due to the perpendicular-standing-spin-wave of YIG. We develop a phenomenological model that nicely reproduces the experimental results including the induced amplitude and phase evolution caused by the magnon-magnon coupling. Our work offers a new route towards studying phase-resolved spin dynamics and hybrid magnonic systems.
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