Design of ultra-thin single-layered anisotropic focusing metasurface

In this letter, an ultra-thin anisotropic metasurface cell with independent control of different polarized waves is introduced firstly. Then different sizes of cells are taken to constituted an anisotropic planar focusing metasurface(PFM) lens with size of 102 × 102mm
²
. Experimental results are in excellent agreement with the simulated ones, indicating perfectly focusing effect of the PFM lens. Moreover, different focal lengths of 50 mm and 30 mm are demonstrated for x/y-polarized incident waves.x/y-polarized incident waves.