Tunable reflective tri-band polarization converter based on graphene composite metasurface
- 1 May 2023
- journal article
- research article
- Published by SPIE-Intl Soc Optical Eng in Optical Engineering
- Vol. 62 (05), 057103
- https://doi.org/10.1117/1.oe.62.5.057103
Abstract
A graphene composite metasurface-based reflective tri-band polarization converter working in the terahertz frequency regime is proposed and investigated by CST Microwave Studio software. The polarization converter achieves high polarization conversion ratios (above 99%) for linear-to-linear polarization conversion at 6.21, 9.11, and 11.66 THz, and for linear-to-circular polarization conversion at 5.14 THz, with a fixed Fermi energy level (Ef) of 1.0 ev due to the excitation of localized surface plasmons. Subsequently, the reason for cross-polarization conversion at three resonant frequencies and the incident angle sensitive property of the converter were discussed. Based on the graphene component, a tunable tri-band polarization converter was obtained and investigated; this converter could be applied in the active modulation area of wireless communication.Keywords
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