Bistable Origami-Inspired 1-bit Coding Acoustic Metasurfaces for Reconfigurable Beam Scanning

This paper proposes a novel approach to acoustic metasurfaces that incorporates bistable origami-inspired folding structure and digital coding to enable dynamic reconfiguration of beam scanning. The unit cell of the metasurface is optimized to realize two equilibrium states with 180-degree phase difference that can be coded as binary 0 and 1. By programming each element of the metasurface with different coding sequences, two symmetric reflected acoustic beams can be manipulated at different angles. The proposed design represents a significant advancement in the field of acoustic metasurfaces, offering a flexible and versatile solution for applications such as acoustic imaging, communication, and sensing.