Functionalized High-Speed Magnon Polaritons Resulting from Magnonic Antenna Effect
Functionalized High-Speed Magnon Polaritons Resulting from Magnonic Antenna Effect
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DOI：
10.1103/physrevapplied.19.034035
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发表时间：
2021-10
影响因子：
4.6
通讯作者：
Kenta Kato;T. Yokoyama;H. Ishihara
中科院分区：
文献类型：
--
作者：
Kenta Kato;T. Yokoyama;H. Ishihara
磁振子极化子（MPs）是指光-磁振子耦合态，可以潜在地作为信息载体，可能实现无电荷计算。然而，光-磁振子耦合本质上是弱的。为了实现足够强的耦合，需要一个大的铁磁体或与微波腔的耦合。在此，我们从理论上提出了一个用于磁振子和磁振子光信息存储器件的基本平台，并讨论了磁振子的输运特性。所提出的多层结构克服了上述问题。由于波导模式，放置在纳米薄层中的磁振子与光强耦合，通过“磁天线效应”表现出厚层MPs的丰富功能。因此，薄层MPs速度更快，而且方向是可切换的。该研究结果将使基于mp的信息器件的铁磁微纳米结构集成成为可能，而不会受到空腔的限制。
Magnon-polaritons (MPs) refer to a light--magnon coupled state and can potentially act as information carriers, possibly enabling charge-free computation. However, the light--magnon coupling is inherently weak. To achieve sufficiently strong coupling, a large ferromagnet or coupling with a microwave cavity is necessary. Herein, we theoretically propose a fundamental platform for magnonic and magnon--optical information storage devices and discuss the transport properties of MP's. The proposed multi-layered structure overcomes the aforementioned issues. Owing to the waveguide modes, magnons placed in a nanometer-thin layer are strongly coupled with light, exhibiting rich functionalities of thick-layer MPs via the `magnetic antenna effect'. Thus, the thin-layer MPs are faster, and the direction is switchable. The results of this study will enable the integration of ferromagnetic micro and nanostructures for MP-based information devices without any restrictions due to cavities.