The interaction of visible and near-infrared light with spin waves in appropriately designed dual nanocavities, for both photons and magnons, is investigated by means of rigorous calculations, correct to arbitrary order in the magneto-optical coupling parameter. It is shown that the concurrent localization of the interacting photon and magnon fields in the same region of space for a long period of time enhances their mutual interaction, provided that specific selection rules are fulfilled. Our results provide evidence for the occurrence of strong effects, beyond the linear response approximation, which lead to enhanced modulation of light by spin waves through multimagnon absorption and emission processes by a photon.

中文翻译：

---

光磁纳米腔可实现强的光-自旋波相互作用

在严格设计的磁光耦合参数中，通过严格的计算研究了可见光和近红外光与自旋波在适当设计的双纳米腔中对光子和磁振子的相互作用。结果表明，在满足特定选择规则的情况下，相互作用的光子场和磁振子场在空间的同一区域内长时间同时定位会增强它们的相互作用。我们的结果提供了证据，证明除了线性响应近似之外，还发生了强大的影响，这导致自旋波通过光子的多磁子吸收和发射过程增强了光的调制。