Magnetic spin modulation by optical vortex-induced spin-spin interaction

Yutaro Goto; Nobuhiko Yokoshi; Hajime Ishihara

doi:10.1117/12.2319479

24 April 2018 Magnetic spin modulation by optical vortex-induced spin-spin interaction

Yutaro Goto, Nobuhiko Yokoshi, Hajime Ishihara

Proceedings Volume 10712, Optical Manipulation Conference; 1071219 (2018) https://doi.org/10.1117/12.2319479
Event: SPIE Structured Light, 2018, Yokohama, Japan

Abstract

We investigate how an optical vortex radiation modulates magnetic spin order of a metallic chiral magnet. The optical vortex carries its intrinsic orbital angular momentum and has a toroidal field intensity, hence such a helical beam is expected to couple to angular momentum of electrons. Here we theoretically construct microscopic interactions between an optical vortex and electrons in the chiral magnet. As a result, we derive a spin-spin interaction which is induced by the optical vortex radiation in the one-dimensional tight-binding model, and find that this interaction can modulate the magnetic order. The optical vortex should be one of the plausible candidates for spin control source, and open a new door to future spintronics devices.

Citation Download Citation

Yutaro Goto, Nobuhiko Yokoshi, and Hajime Ishihara "Magnetic spin modulation by optical vortex-induced spin-spin interaction", Proc. SPIE 10712, Optical Manipulation Conference, 1071219 (24 April 2018); https://doi.org/10.1117/12.2319479

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