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6 February 2024 Design of high-transmittance anomalous refraction metasurface based on geometric phase
Li Zhang, Jun Sun, Mingzhi Hu, Kairong Chang, Shuhao Dai
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Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129796Y (2024) https://doi.org/10.1117/12.3015555
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China
Abstract
In this paper, a transmission metasurface based on a geometric phase is proposed. By designing and arranging the metasurface unit structure, the wavefront of the incident circularly polarized wave can be manipulated arbitrarily. The metasurface unit is composed of a typical “sandwich” structure, metal-dielectric-metal, and the top and bottom metal patterns are composed of C-shaped and rectangles. Using the geometric phase principle, the phase can be adjusted by rotating the metal structure at the operating frequency, and the cross-polarization transmission amplitude is as high as 90 %. By rotating the coding of the unit structure, a coding metasurface can be formed, resulting in abnormal deflection. The simulation results show that the designed coding metasurface can regulate the electromagnetic wave well at 0.63 THz, and the abnormal refraction angles are ± 50.1° and 30°, which well verifies the generalized Snell’s law and has potential application value in the fields of lidar and so on.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Li Zhang, Jun Sun, Mingzhi Hu, Kairong Chang, and Shuhao Dai "Design of high-transmittance anomalous refraction metasurface based on geometric phase", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129796Y (6 February 2024); https://doi.org/10.1117/12.3015555
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KEYWORDS
Refraction
Terahertz radiation
Design and modelling
Wavefronts
Structural design
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