Multifunctional Static Metagratings Using Metallic Scatterers with Strong Spatial Dispersion

Electromagnetic structures that provide multiple operations simultaneously are highly desired in several wave propagation applications. In this paper, we propose all-metallic metagratings that can realize multiple functionalities without requiring any dynamic elements. The constituent scatterers are spatially dispersive (nonlocal) and are designed such that, at a set of specified incident angles, various wave transformations occur for transverse magnetic (TM)-polarized excitations. Moreover, the designed structures completely reflect the incident power under transverse electric (TE) polarization. It is shown that, using these structures, many anomalous refraction and reflection phenomena can be achieved simultaneously. Being passive and static, such structures can be efficiently utilized as various devices like beam deflectors, isolators, and polarizers.