Multifunctional Full-Space Metasurface With Complete Polarization Control

The full-space metasurface generally integrates the functions of traditional reflection and transmission metasurfaces. In this paper, a meta-film with ring slot is used to reflect and propagate complete-polarization waves with lower and higher frequency bands, respectively. Then meta-atoms can be placed up and down of the ring slot to achieve different functions of reflection and transmission. As a verification of this concept, reflection-mode with the function of radar cross section reduction is implemented by using chessboard meta-atoms while the transmission-mode with deflection function is obtained by using geometric elements. Our findings provide a way of designing full-space metasurface with complete-polarization control.