Open AccessTopological pumping in acoustic waveguide arrays with hopping modulation
Author(s) -
Zhaoxian Chen,
Zegiuo Chen,
Zhengwei Li,
Bin Liang,
Guancong Ma,
Yanqing Lu,
Jianchun Cheng
Publication year - 2021
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/ac3ea0
Subject(s) - physics , adiabatic process , topology (electrical circuits) , modulation (music) , robustness (evolution) , coupling (piping) , acoustic wave , waveguide , acoustics , optics , quantum mechanics , mechanical engineering , biochemistry , chemistry , mathematics , combinatorics , engineering , gene
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.