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arXiv · 2104.01250

Surface plasmon-enhanced photo-magnetic excitation of spin dynamics in Au/YIG:Co magneto-plasmonic crystals

Artsiom Kazlou·Alexander L. Chekhov·Alexander I. Stognij·Ilya Razdolski·Andrzej Stupakiewicz
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Abstract

We report strong amplification of photo-magnetic spin precession in Co-doped YIG employing a surface plasmon excitation in a metal-dielectric magneto-plasmonic crystal. Plasmonic enhancement is accompanied by the localization of the excitation within the 300~nm-thick layer inside the transparent dielectric garnet. Experimental results are nicely reproduced by numerical simulations of the photo-magnetic excitation. Our findings demonstrate the magneto-plasmonic concept of subwavelength localization and amplification of the photo-magnetic excitation in dielectric YIG:Co and open up a path to all-optical magnetization switching below diffraction limit with energy efficiency approaching the fundamental limit for magnetic memories.

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Artsiom Kazlou, Alexander L. Chekhov, Alexander I. Stognij, Ilya Razdolski, Andrzej Stupakiewicz. 2021-04-02. Surface plasmon-enhanced photo-magnetic excitation of spin dynamics in Au/YIG:Co magneto-plasmonic crystals. https://arxiv.org/abs/2104.01250

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