Goos–Hänchen Shift Spatially Resolves Magneto-Optical Kerr Effect Enhancement in Magnetoplasmonic Crystals

We report on how observation of the Goos–Hänchen (GH) shift can be used to spatially resolve the transverse magneto-optical Kerr effect (TMOKE) enhancement in all-nickel magnetoplasmonic crystals (MPCs). First, the excitation of surface plasmons in the MPCs leads to a 15.3 μm (18λ) GH shift. Then,...

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Bibliographic Details
Published in:ACS photonics 2024-04, Vol.11 (4), p.1619-1626
Main Authors: Makarova, Anastasia V., Nerovnaya, Anastasia A., Gulkin, Dmitry N., Popov, Vladimir V., Frolov, Aleksandr Yu, Fedyanin, Andrey A.
Format: Article
Language:English
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Summary:We report on how observation of the Goos–Hänchen (GH) shift can be used to spatially resolve the transverse magneto-optical Kerr effect (TMOKE) enhancement in all-nickel magnetoplasmonic crystals (MPCs). First, the excitation of surface plasmons in the MPCs leads to a 15.3 μm (18λ) GH shift. Then, in the presence of a transverse magnetic field, the modulation of the lateral spatial intensity distribution of the reflected light [TMOKE­(x)], caused by the GH shift, reaches 4.7% in the experiment. The spatially resolved TMOKE­(x) values are several times higher compared to those from conventional TMOKE measurements in the MPCs. The concept of the spatially resolved magneto-optical effects under GH shift can be further extended to other magnetophotonic nanodevices for additional enhancing magneto-optical effects, sensing, and light modulation applications.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.3c01844