Metasurfaces for phase and polarization control

Abstract

An optical metasurface providing isotropic beam refraction is reported. The metasurface consists of cascaded metallic layers which allows for complete phase control while maintaining high transmission of the co-polarized field. The efficiency of the metasurface was measured to be 3 times larger than state of the art metasurfaces consisting of a single metallic layer. Future work will consider anisotropic metasurfaces that allow both wavefront and polarization control.