https://doi.org/10.1140/epjd/s10053-022-00455-x
Regular Article – Optical Phenomena and Photonics
Thermally tunable THz polarization converter based on Babinet-inverted metasurface
1
School of Physics and Electronic Science, Changsha University of Science and Technology, 410004, Changsha, China
2
School of Physics and Electronics, Hunan University, 410082, Changsha, China
Received:
9
May
2022
Accepted:
6
July
2022
Published online:
18
July
2022
The polarization converters are imperative components in modern optical system, but its functionality is usually statically adjustable due to the constraint of materials. Herein, a Babinet InSb metasurface composed of C-shape resonators is proposed with its anisotropic amplitudes and phases of reflected light along two orthogonal axes can be tailored by adjusting external temperature in the THz range. The simulation results show that designer metasurface is a 90° polarization rotator with the polarization conversion ratio up to 97% at 1.36 THz when temperature T = 298 K. By tuning the external temperature from 280 to 320 K, the polarization conversion functionality can be realized or eliminated near form 1.1 THz to 1.7 THz. The regulation mechanism of the proposed tunable converter is attributed to the electromagnetic coupling pattern between the upper C-shape metasurface and the metallic substrate at different external temperature. The results appear to hold promise for wave retarder devices and modern optical systems.
Jianing Ouyang and Chenlei Xu these authors have contributed equally.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022
