中国物理B ›› 2020, Vol. 29 ›› Issue (10): 104302-.doi: 10.1088/1674-1056/ab9c0e

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Zhang-Zhao Yang(杨彰昭)1, Jin-Heng Chen(陈晋恒)1, Yao-Yin Peng(彭尧吟)1, Xin-Ye Zou(邹欣晔)1,2,†()   

  • 收稿日期:2020-04-11 修回日期:2020-05-23 接受日期:2020-06-12 出版日期:2020-10-05 发布日期:2020-10-05
  • 通讯作者: Xin-Ye Zou(邹欣晔)

Symmetry-controlled edge states in graphene-like topological sonic crystal

Zhang-Zhao Yang(杨彰昭)1, Jin-Heng Chen(陈晋恒)1, Yao-Yin Peng(彭尧吟)1, and Xin-Ye Zou(邹欣晔)1,2,†   

  1. 1 Key Laboratory of Modern Acoustics (MOE), Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
    2 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-04-11 Revised:2020-05-23 Accepted:2020-06-12 Online:2020-10-05 Published:2020-10-05
  • Contact: Corresponding author. E-mail: xyzou@nju.edu.cn
  • About author:
    †Corresponding author. E-mail: xyzou@nju.edu.cn
    * Project supported by the National Key R&D Program of China (Grant No. 2017YFA0303700), the National Natural Science Foundation of China (Grant Nos. 11634006, 11934009, and 11690030), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20191245), the Fundamental Research Funds for the Central Universities, China (Grant No. 020414380131), and the State Key Laboratory of Acoustics, Chinese Academy of Sciences.

Abstract:

Unique topological states emerged in various topological insulators (TI) have been proved with great application value for robust wave regulation. In this work, we demonstrate the parity inversion related to the definition of the primitive cell in one common lattice, and realize a type of symmetry-controlled edge states confined on the zigzag interfaces of the graphene-like sonic topological crystal. By simply sliding the selected ‘layer’ near the interface, the coupling of the pseudospin states induced by the multiple scattering for the C6v lattice results in the adjustment of the edge states. Based on the physics of the states, we experimentally propose a prototype of acoustic topological filter hosting multiple channels with independent adjustable edge states and realize the selective high transmission. Our work diversifies the prospects for the applications of the gapped edge states in the robust wave regulation, and proposes a frame to design new topological devices.

Key words: acoustic higher-order topological insulator, acoustic filter, controllable edge states

中图分类号:  (General linear acoustics)

  • 43.20.+g
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound) 52.35.Dm (Sound waves)