Fast energy transfer in an acoustic multicavity coupler based on the Su-Schrieffer-Heeger topological model

作     者：Jiabao Yao Shuai Tang Cheng Lü Jianing Zhang Jie Song Yongyuan Jiang 

作者机构：School of Physics School of Information Science and Engineering Harbin Institute of Technology Weihai 264209 Shandong China Collaborative Innovation Center of Extreme Optics Key Laboratory of Micro-Optics and Photonic Technology of Heilongjiang Province Harbin 150001 China Key Laboratory of Micro-Nano Optoelectronic Information System Ministry of Industry and Information Technology Harbin 150001 China 

出 版 物：《Physical Review Applied》 (Phys. Rev. Appl.)

年 卷 期：2024年第22卷第4期

页      面：044009页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China, NSFC, (62075048) National Natural Science Foundation of China, NSFC 

主　　题：Topological effects in acoustic systems Acoustic metamaterials Coupled oscillators Metasurfaces Topological insulators Transducers Cavity resonators Su-Schrieffer-Heeger model 

摘      要：In this work, a compact acoustic coupler based on the Su-Schrieffer-Heeger topological model is presented. The coupler is composed of a cavity array and a series of slits, and the driving pulses in the system are achieved by modulating the width of the slits. The propagation process of acoustic energy is greatly accelerated by selecting and optimizing the driving pulses within a compact configuration. An optimized protocol is adopted to drive the system and the coupler is greatly shortened to 0.3 m. Stable and asymmetric energy transfer is realized from the initial cavity to the end cavity via adiabatic state evolution. Benefitting from the topological protection exhibited by the energy band gap in the proposed multicavity coupler, the energy transfer remains robust after accelerating operation, which is verified experimentally. More uniquely, the coupler has application potential in unidirectional or nonreciprocal energy transfer when a certain loss or spatiotemporal modulation are introduced into the coupler, guaranteeing the security of signal exchange.