Near-field chiral excitation of universal spin-momentum locking transport of edge waves in microwave metamaterials

IF 20.6 1区物理与天体物理 Q1 OPTICS

Advanced Photonics Pub Date : 2022-07-01 DOI:10.1117/1.AP.4.4.046004

Zhixia Xu, Jie Chang, Jin Tong, D. Sievenpiper, T. Cui

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引用次数: 9

Abstract

Abstract. Controlling energy flow in waveguides has attractive potential in integrated devices from radio frequencies to optical bands. Due to the spin-orbit coupling, the mirror symmetry will be broken, and the handedness of the near-field source will determine the direction of energy transport. Compared with well-established theories about spin-momentum locking, experimental visualization of unidirectional coupling is usually challenging due to the lack of generic chiral sources and the strict environmental requirement. In this work, we design a broadband near-field chiral source in the microwave band and discuss experimental details to visualize spin-momentum locking in three different metamaterial waveguides, including spoof surface plasmon polaritons, line waves, and valley topological insulators. The similarity of these edge waves relies on the abrupt sign change of intrinsic characteristics of two media across the interface. In addition to the development of experimental technology, the advantages and research status of interface waveguides are summarized, and perspectives on future research are presented to explore an avenue for designing controllable spin-sorting devices in the microwave band.

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微波超材料边缘波普遍自旋动量锁定输运的近场手性激发

摘要控制波导中的能量流在从射频到光波段的集成设备中具有诱人的潜力。由于自旋-轨道耦合，镜像对称性将被打破，近场源的利手性将决定能量传输的方向。与公认的自旋动量锁定理论相比，由于缺乏通用的手性源和严格的环境要求，单向耦合的实验可视化通常具有挑战性。在这项工作中，我们在微波波段设计了一个宽带近场手性源，并讨论了在三种不同的超材料波导中可视化自旋动量锁定的实验细节，包括欺骗表面等离子体激元、线波和谷拓扑绝缘体。这些边缘波的相似性依赖于界面上两种介质固有特性的突变符号。除了实验技术的发展外，还总结了界面波导的优势和研究现状，并对未来的研究前景进行了展望，以探索设计微波波段可控自旋分选器件的途径。

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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来源期刊

Advanced Photonics OPTICS-

CiteScore

22.70

自引率

1.20%

发文量

审稿时长

18 weeks

期刊介绍： Advanced Photonics is a highly selective, open-access, international journal that publishes innovative research in all areas of optics and photonics, including fundamental and applied research. The journal publishes top-quality original papers, letters, and review articles, reflecting significant advances and breakthroughs in theoretical and experimental research and novel applications with considerable potential. The journal seeks high-quality, high-impact articles across the entire spectrum of optics, photonics, and related fields with specific emphasis on the following acceptance criteria: -New concepts in terms of fundamental research with great impact and significance -State-of-the-art technologies in terms of novel methods for important applications -Reviews of recent major advances and discoveries and state-of-the-art benchmarking. The journal also publishes news and commentaries highlighting scientific and technological discoveries, breakthroughs, and achievements in optics, photonics, and related fields.