Observation of Room Temperature Exchange Cavity Magnon-Polaritons in Metallic Thin Films

IF 4.4 Q1 OPTICS
Mawgan A. Smith, Adam L. Lafferty, Alban Joseph, Matthew R. McMaster, Jade N. Scott, William R. Hendren, Robert M. Bowman, Martin P. Weides, Rair Macêdo
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Abstract

Cavity magnonics has become an intriguing field due to its potential to enable next-generation technologies centered around controlling information exchange in hybrid resonant systems. Investigating the tunability of magnon-photon coupling is key to advancing the field. Here, the observation of coupling between the first order magnon mode in a metallic thin film with a cavity photon mode is reported. An electromagnetic perturbation theory that takes account of perpendicular standing spin waves and their respective dissipation is utilized to estimate the coupling strength. The metallic thin film exhibits notably lower dissipation for the higher-order magnon mode, which is not observed in a thin film magnetic insulator. As such, and given that metallic Kittel magnons typically exhibit lower coherence times than their insulator counterparts, the excitation and coupling to specific higher order modes could lengthen these times compared to previous observations, which may be useful for future integration into quantum devices.

Abstract Image

金属薄膜中的室温交换腔磁极子观测
腔隙磁子学已成为一个引人入胜的领域,因为它有可能实现以控制混合谐振系统中的信息交换为中心的下一代技术。研究磁子-光子耦合的可调谐性是推动这一领域发展的关键。本文报告了在金属薄膜中观察到一阶磁子模式与空腔光子模式之间的耦合。利用考虑了垂直驻留自旋波及其各自耗散的电磁扰动理论来估算耦合强度。金属薄膜在高阶磁子模式下的耗散明显较低,这在薄膜磁绝缘体中是无法观察到的。因此,考虑到金属基特尔磁子的相干时间通常低于绝缘体磁子的相干时间,与之前的观测结果相比,对特定高阶模式的激发和耦合可能会延长相干时间,这对未来集成到量子设备中可能非常有用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
7.90
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