1. Spin-orbit locking of magnons with localized microwave fields
- Author
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Cai, Chengyuan, Zhang, Zubiao, Zou, Ji, Bauer, Gerrit E. W., and Yu, Tao
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We address the photonic spin-orbit coupling known from nano-optics and plasmonics in the microwave regime. The spin $\mathbf{S}$ and momentum $\mathbf{q}$ of microwaves emitted by an excited magnetic particle are locked by $\mathbf{q}\cdot\mathbf{S}=0$ with a fixed chirality $\hat{\mathbf{n}}\cdot(\hat{\bf S}\times\hat{\bf q})=1$ when evanescent along $\hat{\mathbf{n}}\perp {\bf q}$. This field excites magnons in a nearby magnetic film in the form of directional beams that rotate with the magnetization direction. The exchange of these magnons between two distant nanomagnets leads to a highly tunable strong coupling and entangles their excited states., Comment: 11 pages, 8 figures
- Published
- 2024