Physical Review Applied, Journal Year: 2024, Volume and Issue: 22(6)

Published: Dec. 26, 2024

The control of topological sound transport has attracted increasing attention from researchers. Topological interface states, which have pseudospin-momentum-locked dispersions, render backscattering immune against defects. Here we report on the experimental observation energy transfer through distinct passages, whose existence and elimination are attributed to coupling decoupling between states. phenomenon is elucidated well using interference theory wavelength, including propagation constants two supermodes length as key parameters. As a potential application, numerically experimentally demonstrate wavelength demultiplexer, where incident can be split into different channels, structural disorder along by employing wavelengths states at coupled frequencies. Our work provides prototype for controlling acoustic transport, may facilitate practical applications in multichannel signal processing devices separating wavelengths. locked icon Physics Subject Headings (PhySH)Acoustic metamaterialsEdge statesPhononic crystalsTopological effects systemsValley degrees freedomDemultiplexersTopological insulatorsSound wave techniques

Language: Английский