声学三聚体波导中手性边缘态对的观察

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Qian-Hao Guo, Yang Zhang, Xiao-Huan Wan, Li-Yang Zheng
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引用次数: 0

摘要

在这里,我们实验研究了类似于扩展Su-Schrieffer-Heeger模型的声学三聚波导的拓扑状态特性。通过将镜像对称性整合到结构中,即使原始结构本身不表现手性,我们也能够观察到由于隐藏的手性对称性而存在的两对手性边缘态。利用子空间哈密顿算子的圈数揭示了隐对称性的存在性,揭示了手性边态对起源的拓扑结构。测量到的声在边缘的色散和定位在理论上和模拟上验证了观测结果。这项研究不仅丰富了我们对声学拓扑系统的理解,而且提供了一个适用于其他物理环境的框架。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Observation of chiral edge state pairs in an acoustic trimer waveguide
Here, we experimentally investigate the topological state properties in an acoustic trimer waveguide akin to the extended Su–Schrieffer–Heeger model. By integrating a mirror symmetry into the structure, we are able to observe the existence of two pairs of chiral edge states due to a hidden chiral symmetry even though the original structure itself does not exhibit chirality. We uncover the existence of the hidden symmetry and unearth the topology for the origin of chiral edge state pairs using winding number of a subspace Hamiltonian. The measured dispersion and localization of sound on the edges verify the observations in theory and simulations. This study not only enriches our understanding of acoustic topological systems but also provides a framework applicable to other physical contexts.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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