Parity-Frequency-Space Elastic Spin Control of Wave Routing in Topological Phononic Circuits.

ABSTRACT: Topological phononic cavities, such as ring resonators with topological whispering gallery modes (TWGMs), offer a flexible platform for the realization of robust phononic circuits. However, the chiral mechanism governing TWGMs and their selective routing in integrated phononic circuits remain unclear. This work reveals, both experimentally and theoretically, that at a phononic topological interface, the elastic spin texture is intricately linked to, and can be explained through a knowledge of, the phonon eigenmodes inside each unit cell. Furthermore, for paired, counterpropagating TWGMs based on such interfaces in a waveguide resonator, this study demonstrates that the elastic spin exhibits locking at discrete frequencies. Backed up by theory, experiments on kHz TWGMs in thin honeycomb-lat

SUBMITTER: Huang Y 

PROVIDER: S-EPMC11423203 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature