Full-space polarization conversion of electromagnetic waves at terahertz frequency based on metasurface

Abstract

In this paper, a full-space electromagnetic wave polarization converter working in the terahertz frequency was put forward, and its physical mechanism was also analyzed. The polarization converter could realize the reflection cross-polarization conversion in the frequency range of 3.16–3.75 THz, with the Polarization Conversion Rate (PCR) of more than 90%. In the frequency range of 0.43–2.15 THz, it could realize transmission cross-polarization conversion, with the PCR close to 100%. In short, the designed metasurface polarization converter has a simple structure, realizes full-space manipulation of electromagnetic waves, facilitates the miniaturization and integration of the system, and has the potential applications in antennas, imaging systems, remote sensors, and radiometers.

Keywords

• terahertz
• metasurface
• polarization converter
• full-space