Observation of evanescent spin waves in the magnetic dipole regime

Keita Matsumoto, Isao Yoshimine, Kosei Himeno, Tsutomu Shimura, Takuya Satoh

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

We observed spin-wave transmission through an air gap that works as a prohibited region. The spin waves were excited by circularly polarized pump pulses via the inverse Faraday effect, and their spatial propagation was detected through the Faraday effect of probe pulses using a pump-probe imaging technique. The experimentally observed spin-wave transmission was reproduced using numerical calculations with a Green's function method and micromagnetic simulation. We found that the amplitude of the spin waves decays exponentially in the air gap, which indicates the existence of evanescent spin waves in the magnetic dipole regime. This finding will pave the way for controllable amplitudes and phases of spin waves propagating through an artificial magnonic crystal.

本文言語英語
論文番号184407
ジャーナルPhysical Review B
101
18
DOI
出版ステータス出版済み - 5 1 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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