Figure 1. The geometric phase coded digital metasurface.

(a) Distinct directive EM wave scattering dependent on the incident polarization by metasurface with regular coding sequence. (b) Polarization insensitive diffusion-like reflection by metasurface with randomized coding sequence. (c) Details of the corrugated meander line structured unit cell which is oriented at the rotation angle of α = 90° with respect to x-axis. The violet arrow represents the orientation of top metallic pattern. The optimized geometric configuration of the unit cell is by, in millimeter, p = 8, h = 2, a = 4.6, b = 4.25, and w = 0.25.