Qian-Hao Guo, Yang Zhang, Xiao-Huan Wan, Li-Yang Zheng
{"title":"声学三聚体波导中手性边缘态对的观察","authors":"Qian-Hao Guo, Yang Zhang, Xiao-Huan Wan, Li-Yang Zheng","doi":"10.1063/5.0256334","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"65 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Observation of chiral edge state pairs in an acoustic trimer waveguide\",\"authors\":\"Qian-Hao Guo, Yang Zhang, Xiao-Huan Wan, Li-Yang Zheng\",\"doi\":\"10.1063/5.0256334\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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.\",\"PeriodicalId\":8094,\"journal\":{\"name\":\"Applied Physics Letters\",\"volume\":\"65 1\",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1063/5.0256334\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1063/5.0256334","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
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.
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.