Abstract In this paper, we propose and numerically investigate a new non-reciprocal optical device enabling enhanced optical TE mode isolation at telecom wavelength, compatible with applications. The principle is based on magnetoplasmonic interaction between a garnet waveguide and a side-coupled gold grating. Grating nanoslits host Fabry–Perot resonances that couple to Surface Plasmon Polaritons excited at the interface between the metal and the waveguide. Additionally, coarse or fine sensitivity of the Fabry Perot resonances to nanoslits dimensions opens the way to continuously selectable operation frequency of the plasmonic isolator.

中文翻译：

---

基于亚波长金光栅耦合共振的集成磁等离子体隔离增强

摘要 在本文中，我们提出并数值研究了一种新的非互易光学器件，能够在电信波长下实现增强的光学 TE 模式隔离，与应用兼容。该原理基于石榴石波导和侧耦合金光栅之间的磁等离子体相互作用。光栅纳米狭缝承载法布里-珀罗共振，该共振耦合到在金属和波导之间的界面处激发的表面等离子体激元。此外，法布里珀罗共振对纳米狭缝尺寸的粗略或精细灵敏度为等离子体隔离器的连续可选工作频率开辟了道路。