Metasurfaces have shown rich potentials in controlling acoustic and electromagnetic (EM) waves. However, the existing full-space wavefront manipulation solutions are limited to a single physical field. Here, the EM-acoustic dual-physical transmission-reflection-integrated coding metasurface (DTRIM) which is composed of a tri-layer structure is proposed. Specifically, the DTRIM can independently and continuously manipulate transmitted/reflected EM wavefronts via switching polarization states of incident EM waves and reflected acoustic wavefronts, achieving a tri-channel wavefront manipulation on a single platform. Simulations demonstrate that the DTRIM can arbitrarily merge multiple functions including multi-beam generation, focusing and holograms in full-space. This work enables dual-physical full-space wavefront control and significantly enriches the functionalities of metasurfaces, paving the way for integrated multifunctional EM-acoustic devices.
Ye et al. (Fri,) studied this question.