Orthogonal Polarized Multi-beams with Shared Aperture Metasurface in Terahertz Regime

Based on Generalized Snell's law, we have proposed a kind of new metasurface, which consists of cross I-shaped structures and a ground plane separated by a dielectric substrate. The normally incident linear-polarized waves can be reflected by the elements, and the reflection phases of x- and y-polarized waves can be controlled independently by adjusting its length along x and y directions, respectively. Inspired by its good ability in beam shaping and reflecting, we have extended it to a multibeam generating metasurface, by which a series of reflection multi-beam waves can be observed in terahertz regime when these unit elements are arranged appropriately. The simulation results show that the designed metasurface has a good performance in manipulating orthogonal polarized waves independently at a frequency of 0.3THz. The presented method provides a new idea in orthogonal polarized multibeam generation, which has a good potential application in detection technology, multiplex communication and beam shaping.