Subwavelength Chiral Spiral Acoustic Metamaterials for a Robust Topological Acoustic Insulator | |
Yang T(杨洮); Chen M(陈猛); Xiao BY(肖伯雅); Liu Y(刘宇); Jiang H(姜恒); Wang YR(王育人) | |
发表期刊 | APPLIED SCIENCES-BASEL |
2022-08 | |
卷号 | 12期号:15页码:7778 |
摘要 | Topological acoustic insulators enable sound waves to transmit along the surface without backscattering, which builds a new pathway towards sound wave control. However, a large share of topological acoustic insulators are realized based on special point group symmetry and Bragg scattering mechanism. This method not only exerts a restriction on the unit cell design but also requires the lattice constant to be comparable with the wavelength. In this paper, the chiral spiral acoustic metamaterials are constructed based on an Archimedean spiral structure. This structure enjoys subwavelength characteristics and is easy to construct. Taking advantage of the chirality of the spiral structure topological phases with opposite energy flow direction can be constructed. The edge state is formed at the interface composed of the spiral units sharing different chirality, which does not depend on point group symmetry. The topological transportation on the interfaces shows strong robustness despite sharp corners verified by straight and zigzag waveguides. The topological acoustic insulator with a chiral spiral structure provides a 11el strategy for small acoustic devices with robust sound transmission. |
关键词 | chiral spiral structure acoustic metamaterials topological transportation |
学科领域 | Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied |
DOI | 10.3390/app12157778 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000840160300001 |
项目资助者 | Research Program of Beijing [Z161100002616034] ; National Natural Science Foundation of China [11972034] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040301] ; Youth In11ation Promotion Association of the Chinese Academy of Science [2020018] |
论文分区 | 二类 |
力学所作者排名 | 1 |
RpAuthor | Chen, M |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/90148 |
专题 | 微重力重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Yang T,Chen M,Xiao BY,et al. Subwavelength Chiral Spiral Acoustic Metamaterials for a Robust Topological Acoustic Insulator[J]. APPLIED SCIENCES-BASEL,2022,12,15,:7778. |
APA | Yang T,Chen M,Xiao BY,Liu Y,Jiang H,&Wang YR.(2022).Subwavelength Chiral Spiral Acoustic Metamaterials for a Robust Topological Acoustic Insulator.APPLIED SCIENCES-BASEL,12(15),7778. |
MLA | Yang T,et al."Subwavelength Chiral Spiral Acoustic Metamaterials for a Robust Topological Acoustic Insulator".APPLIED SCIENCES-BASEL 12.15(2022):7778. |
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