Unidirectional control of optically induced spin waves

I. Yoshimine, Y. Y. Tanaka, T. Shimura, T. Satoh

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Unidirectional control of optically induced spin waves in a rare-earth iron garnet crystal is demonstrated. We observed the interference of two spin-wave packets with different initial phases generated by circularly polarized light pulses. This interference results in unidirectional propagation if the spin-wave sources are spaced apart at 1/4 of the wavelength of the spin waves and the initial phase difference is set to π/2. The propagating direction of the spin wave is switched by the polarization helicity of the light pulses. Moreover, in a numerical simulation, applying more than two spin-wave sources with a suitable polarization and spot shape, arbitrary manipulation of the spin wave by the phased array method was replicated.

Original languageEnglish
Article number67001
JournalEPL
Volume117
Issue number6
DOIs
Publication statusPublished - Mar 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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