双层六方声子晶体的谷现象及角态实现

doi:10.13438/j.cnki.jdzk.2025.05.007

吉首大学学报（自然科学版） ›› 2025, Vol. 46 ›› Issue (5): 45-52.DOI: 10.13438/j.cnki.jdzk.2025.05.007

双层六方声子晶体的谷现象及角态实现

刘芳，王甲豪，孔鹏，赵鹤平，邓科

（1.吉首大学物理与机电工程学院，湖南吉首 416000；2.长沙理工大学物理与电子科学学院，湖南长沙 410114）

出版日期:2025-09-25 发布日期:2025-11-07
作者简介:刘芳(2000—),女,湖北孝感人,吉首大学物理与机电工程学院硕士研究生,主要从事声学拓扑研究

Valley Phenomena and Corner State Realization in Bilayer Hexagonal Phononic Crystals

LIU Fang,WANG Jiahao,KONG Peng,ZHAO Heping,DENG Ke

(1.Department of Physics and Mechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.School of Physics and Electronic Science,Changsha University of Science and Technology,Changsha 410114,China)

Online:2025-09-25 Published:2025-11-07

摘要/Abstract

摘要：基于谷拓扑绝缘体具有谷选择性激发、抑制声波反向散射等优点，设计了一种镜面对称的双层六方声子晶体.通过调控晶体中散射体的散射角度，打破了晶体的空间对称性，进而导致谷的出现.不同散射体散射角度下的晶体具有不同的谷拓扑相，基于不同谷拓扑相实现了路径的选择输运.利用具有2种谷拓扑相的双层六方声子晶体构建三角形超胞，实现了2组三角形角态.

关键词： 双层六方声子晶体, 谷拓扑, 角态

Abstract: Benefiting from valley-selective excitation and suppressed acoustic backscattering in valley topological insulators,we designed a mirror-symmetric bilayer hexagonal phononic crystal.Breaking spatial symmetry by adjusting the scatterers' orientation induces valley states.Numerical simulations show different valley topological phases emerge under varying scatterer angles,enabling selective path transport.Furthermore,constructing a triangular supercell with two valley topological phases in the bilayer hexagonal phononic crystal yields two sets of triangular corner states.

Key words: bilayer hexagonal phononic crystals, valley topology, corner state

刘芳, 王甲豪, 孔鹏, 赵鹤平, 邓科. 双层六方声子晶体的谷现象及角态实现[J]. 吉首大学学报（自然科学版）, 2025, 46(5): 45-52.

LIU Fang, WANG Jiahao, KONG Peng, ZHAO Heping, DENG Ke. Valley Phenomena and Corner State Realization in Bilayer Hexagonal Phononic Crystals[J]. Journal of Jishou University(Natural Sciences Edition), 2025, 46(5): 45-52.

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双层六方声子晶体的谷现象及角态实现

Valley Phenomena and Corner State Realization in Bilayer Hexagonal Phononic Crystals

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