Metasurface-based terahertz wideband linear polarization converter

Abstract

We designed a linear polarization converter based on metasurface and simulated its functionality. It has a broad bandwidth and operates in the terahertz frequency range (0.4–1.2 THz). The polarization converter consists of a polyimide substrate, a metal grating and a bimetallic split ring resonator. In a bimetallic split ring resonator, the gaps between the rings are rotated by 90° from one another. The structure is simulated by commercial software CST STUDIO SUITE. The results show that the device successfully converts the polarization of terahertz wave from y to x. This structure also has high stability in terms of incidence angle and operates efficiently in the range of 0° to 45°.This kind of polarization converter has a wide application prospect in satellite communication, radar detection, 3D imaging of displays, and other fields.

Keywords

• Terahertz
• Metasurface
• Y-polarized wave
• Polarization converts
• Electrical polarization field