Dual-mode topological rainbow based on Kagome sandwich structure

IF 2.2 3区 物理与天体物理 Q2 OPTICS
Hongxiang Zhang , Jianjun Gao , Rensheng Xie , Dayuan Xiong
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引用次数: 0

Abstract

Topological slow light offers an attractive platform for enhancing light-matter interaction because of its immunity to backscattering and robustness to defects. Most topological rainbow trapping structures are designed to support only one mode during frequency routing. However, in this work, we have designed a dual-mode topological rainbow trapping structure to enrich the functionality of frequency routing in slow light, based on Kagome sandwich structure. With the expanding perturbation index m decreasing gradually, the proposed structure supports coupled topological dual-mode edge states. Through the theoretical and numerical calculations, the group velocity of dual-mode edge states can be slowed to near-zero areas, resulting in the trapping of light at the corresponding positions. Our work introduces a new approach to utilizing coupled topological edge states for building multifunctional slow light optical devices.
基于Kagome夹层结构的双模拓扑彩虹
拓扑慢光具有抗后向散射和对缺陷的鲁棒性,为增强光-物质相互作用提供了一个有吸引力的平台。大多数拓扑彩虹捕获结构被设计为在频率路由期间只支持一种模式。然而,在这项工作中,我们设计了一种基于Kagome三明治结构的双模拓扑彩虹捕获结构,以丰富慢光下频率路由的功能。随着扩展微扰指数m的逐渐减小,该结构支持耦合拓扑双模边缘态。通过理论和数值计算,可以将双模边缘状态的群速度减慢到接近零的区域,从而在相应的位置捕获光。我们的工作介绍了一种利用耦合拓扑边缘态来构建多功能慢光光学器件的新方法。
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来源期刊
Optics Communications
Optics Communications 物理-光学
CiteScore
5.10
自引率
8.30%
发文量
681
审稿时长
38 days
期刊介绍: Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.
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