Two-dimensional beam steering with tunable metasurface in infrared regime

Abstract Tunable metasurfaces can change the optical properties of incident light at will such as amplitude, phase, and polarization in a time-dependent fashion. Ultrafast switching speed ability for pixel size reduction tunable metasurface allow various applications detection ranging, interferometric sensors, free space communications, to name few. Although there have been successful demonstrations wavefront shaping using metasurface, implementation two-dimensional array that be individually addressed frequency regime still remains challenging. Here, we present experimental demonstration beam steering with by binary phase grating infrared regime. The unit cell is composed metal–dielectric–oxide structure indium tin oxide an active layer, which modulated top fan-out electrodes. two-dimensionally pixelated has above 137°