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Realization of multidimensional sound propagation in 3D acoustic higher-order topological insulator

文献类型：期刊论文

作者Meng, Fei1,2,3; Chen, Yafeng3,4; Li, Weibai3; Jia, Baohua3; Huang, Xiaodong3
刊名APPLIED PHYSICS LETTERS
出版日期2020-10-12
卷号117期号:15页码:5
ISSN号0003-6951
DOI10.1063/5.0023033
英文摘要Higher-order topological insulators (TIs) develop the conventional bulk-boundary correspondence theory and increase the interest in searching innovative topological materials. To realize a higher-order TI with a wide passband of one-dimensional (1D) and two-dimensional (2D) transportation modes, we design three-dimensional non-trivial and trivial sonic crystals whose combination mimics the Su-Schrieffer-Heeger model. The topological boundary states can be found at the interfaces, including the zero-dimensional corner state, 1D hinge state, and 2D surface state. The fabricated sample with the bent two-dimensional and one-dimensional acoustic channels exhibits the multidimensional sound propagation and verifies the mode transition among the complete bandgap, hinge mode, and surface mode. The bandwidth of the single-mode hinge state achieves a large relative bandwidth of 9.1% in which sound transports one-dimensionally without significant leak into the surfaces or the bulk. The higher-order topological states in the study pave the way for sound manipulation in multiple dimensions.
资助项目Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z018009] ; Australian Research Council[FT130101094]
WOS研究方向Physics
语种英语
出版者AMER INST PHYSICS
WOS记录号WOS:000585765400001
源URL[http://119.78.100.198/handle/2S6PX9GI/25014]  
专题中科院武汉岩土力学所
通讯作者Jia, Baohua; Huang, Xiaodong
作者单位1.Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China
2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
3.Swinburne Univ Technol, Ctr Translat Atomat CTAM, Fac Sci Engn & Technol, Hawthorn, Vic 3122, Australia
4.Hunan Univ, Key Lab Adv Technol Vehicle Body Design & Manufac, Changsha 410082, Peoples R China
推荐引用方式
GB/T 7714		 Meng, Fei,Chen, Yafeng,Li, Weibai,et al. Realization of multidimensional sound propagation in 3D acoustic higher-order topological insulator[J]. APPLIED PHYSICS LETTERS,2020,117(15):5.
APA Meng, Fei,Chen, Yafeng,Li, Weibai,Jia, Baohua,&Huang, Xiaodong.(2020).Realization of multidimensional sound propagation in 3D acoustic higher-order topological insulator.APPLIED PHYSICS LETTERS,117(15),5.
MLA Meng, Fei,et al."Realization of multidimensional sound propagation in 3D acoustic higher-order topological insulator".APPLIED PHYSICS LETTERS 117.15(2020):5.

入库方式： OAI收割

来源：武汉岩土力学研究所

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