Polarization-multiplexing achromatic metasurfaces for manipulation of terahertz waves

• DOI: 10.1364/josab.462959
• Publication Date: 2022-07-25T11:30:08Z
• Authors: Chong Qin; Wenhui Fan; Qi Wu; Xiaoqiang Jiang; Hui Yan
• Keywords: Achromatic lens; Terahertz gap

Metasurfaces that can effectively manipulate electromagnetic waves provide a novel solution to realize efficient terahertz functional devices. However, the chromatic aberration of metasurfaces is remarkable challenge for their extensive applications. Multi-functional are highly desirable in practical Here, we demonstrate polarization-multiplexing achromatic working regime based on anisotropic meta-atoms which exhibit form birefringence. Specifically, metalens frequency range from 0.8 THz 1.2 proposed and verified numerically, focus within bandwidth different focal planes by varying polarization state an incident wave; deviation length less than 8.88% across whole bandwidth. In addition, deflector also designed simulated, deflect wave directions manipulating wave. The demonstrated here great significance development ultra-compact, flexible, multi-functional devices metasurfaces.