AI 中文总结
本文提出一种平面异质结构，通过解析求解耦合方程预测反铁磁磁振子与类表面等离激元在太赫兹波段存在强耦合，为相关杂化系统提供了片上集成的可行平台。
AI 中文摘要
混合磁振子系统为自旋激发与其他物理自由度之间的相干信息交换提供了通用平台。尽管基于亚铁磁球和局域微波谐振器已观测到磁振子与类表面等离激元的强耦合，但平面磁性结构中能否实现相干磁振子-等离激元耦合仍未得到探索。本文研究了由反铁磁（AFM）薄膜、电介质间隔层和结构化金属表面组成的平面异质结构中反铁磁磁振子与类表面等离激元的杂化。通过解析求解耦合的麦克斯韦方程和磁化动力学方程，我们预测太赫兹波段存在强磁振子-等离激元耦合，表现为色散中明显的反交叉。该耦合源于电介质间隔层中磁振子模式与等离激元模式的空间重叠，可通过系统的几何参数有效调控。计算得到的合作率证实该混合系统可工作在强耦合 regime，实现磁振子与等离激元之间的相干信息传递。我们的结果为 plasmon-magnon 杂化建立了更易于片上操控与集成的平面平台。
英文摘要
Hybrid magnonic system provides a versatile platform for coherent information exchange between spin excitations and other physical degrees of freedom. While strong coupling between magnons and spoof plasmons has been observed based on ferrimagnetic spheres and localized microwave resonators, it remains unexplored whether coherent magnon-plasmon coupling can be achieved in planar magnetic structures. Here we study the hybridization of antiferromagnetic (AFM) magnons and spoof surface plasmons in a planar heterostructure consisting of an AFM thin film, a dielectric spacer, and a structured metal surface. By analytically solving the coupled Maxwell and magnetization dynamics equation, we predict strong magnon-plasmon coupling in the terahertz regime, manifested by pronounced avoided crossings in the dispersion. The coupling originates from the spatial overlap between magnonic and plasmonic modes in the dielectric spacer, and can be efficiently tuned through geometric parameters of the system. The calculated cooperativity confirms that the hybrid system can operate in the strong coupling regime, enabling coherent information transfer between magnons and plasmons. Our results establish a planar platform for plasmon-magnon hybridization, which is more amenable to on-chip manipulation and integration.
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