Topological pumping in acoustic waveguide arrays with hopping modulation

Zhaoxian Chen, Zeguo Chen, Zhengwei Li, Bin Liang*, Guancong Ma, Yanqing Lu, Jianchun Cheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Thouless pumping is the adiabatic transportation of quantized charge, which is regarded as the dynamic version of the quantum Hall effect. Here we propose the design of an acoustic system to demonstrate the topological pumping characterized by transporting acoustic energy from one side to the opposite. The system is composed of coupled acoustic waveguide arrays with modulated coupling along both cross-sections and the propagating direction. We explore multiple topological phases by introducing rich spatial frequency or enlarged range of the hopping modulation. Such distinct topological phases are evidenced by adiabatic evolution of the edge states, where the acoustic system varies continuously and slowly along the state propagating direction. The robustness behavior of the edge states transport is also verified with numerical simulations to imply their topology origin. Our work provides a route to realize topological phases and utilize the corresponding edge states in waveguide arrays that can lead to versatile acoustic wave manipulation applications.

Original languageEnglish
Article number013004
JournalNew Journal of Physics
Volume24
Issue number1
Early online date30 Dec 2021
DOIs
Publication statusPublished - Jan 2022

Scopus Subject Areas

  • Physics and Astronomy(all)

User-Defined Keywords

  • edge state pumping
  • hopping modulation
  • topological acoustics

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