Design of Anisotropic Metagratings for Diverse Polarization Anomalous Reflection

This work presents a realistic simple printed circuit board typed metagrating structure to achieve near-unity efficiency for dual-polarization anomalous reflection. The proposed scatterers are meticulously designed using a set of electric dipoles, which effectively breaks the symmetricity under normal incidence, allowing for high power coupling into the desired propagating mode. Furthermore, the inclusion of an artificial ground layer enhances the metagrating's capability for different polarization performance in wide-angle anomalous reflection. This advancement extends the practical applications and versatility of metagrating concepts.