Kirigami-Inspired Reconfigurable Phase Gradient Metasurface

Abstract

Reconfigurable metasurfaces have attracted great attention in the field of electromagnetic (EM) wave manipulations. Here, we present a series of kirigami-inspired reconfigurable phase gradient metasurfaces to efficiently control anomalous refraction of scattering wave through changing the folding angle $\beta$. A reconfigurable grating, a special case of phase gradient metasurfaces, is demonstrated in both numerical simulations and experiments based on the generalized Snell’s law. When the folding angle $\beta$ is changed within the range of 20°~70°, the anomalous refraction angle varies within 39°~70° under the normal incidence of transverse electric (TE) wave and 39°~72° under that of transverse magnetic (TM) wave. Compared with other metasurfaces, our reconfigurable strategy that uses maneuverable devices or structures to control the EM wave is more versatile and shows great potential in engineering applications.