Reversible tunable topological phononic crystals based upon thermo-acoustic hydrogels.

ABSTRACT: Topological insulator originally found in electronic systems has inspired an analogue in phononic crystals, which has revolutionized fundamental concepts of elastic and acoustic transmission, offering one-way propagation edge modes immune to backscattering. Nevertheless, for traditional topological phononic crystal (TPC), once the structure is made, only a particular bandgap frequency can occur. Realization of reconfigurability and frequency tuning of topological one-way transmission is challenging. To solve the problem, the TPC is made active on penetration with thermosensitive acoustic hydrogels to produce a reconfigurable bandgap of acoustic wave. We explore that at a certain frequency range, the topological edge state (TES) within the TPC can be reversibly turned on/off as changing the

SUBMITTER: Lian M 

PROVIDER: S-EPMC12779635 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature