Chirality-assisted three-dimensional acoustic Floquet lattices

Abstract

This work shows a distinct paradigm of configuring generalized spatial Floquet lattices through periodically driven coupling networks, by establishing a mapping between the time and space dimensions. The authors show that the acoustic 3D Floquet lattice is a direct analogue of the Chern insulators. The cyclotron orbiting motion of sound in the bulk and reversely orbiting motion on the surface are experimentally demonstrated in the proposed Floquet lattice.