A Versatile Meta-device for Linearly Polarized Waves in Terahertz Region

Abstract A device constructed from metamaterials is proposed, which makes asymmetric transmission and reflection achieved in addition to a perfect dual-band unidirectional reflectionlessness at THz frequencies for linearly polarized incident waves. Owing to the unique structure characteristics, it exhibits an excellent performance of converting linear to circular polarization at multiple frequencies. Moreover, the maximum of PCR reaches 99.94%, and the ellipticity approaches 1 at eight frequencies. Additionally, UR and AT are achieved within broad ranges of the incidence angle θ and distance d between two resonators. Utilization of the metamaterial design will facilitate the multifunctionality of THz meta-device and promote the further advancements in integrated processes, communication, radar and other fields.