Highly integrated programmable metasurface for multifunctions in reflections and transmissions

Programmable manipulations on both reflections and transmissions usually require multi-layer metasurfaces, numerous active components, and control circuits, leading to a larger profile, complicated bias circuit design, and higher cost. To address this problem, we present a highly integrated multifunctional metasurface for programmable reflections and transmissions using a single-layer metasurface and a single active component in each element. We design a multi-channel switchable structure, dominated by a single-pole triple-throw switcher, to alternatively achieve the 1-bit reflection-phase programmable modulations, total reflection, absorption, and transmission. Benefitting from the highly integrated packaging of the switcher chip and meta-structures, our scheme significantly reduces the design difficulty and improves the composite performance. The experimental results validate the capability of the proposed metasurface in realizing the multiple functions in a programmable way using the simple structure and control circuit. We believe that our design could further enrich the design methods of metasurfaces and provide new functions for information devices and systems.