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BIN LOU1, JIANFENG XU2, FUHAI LIU2, LIZHEN XU3, BO FANG4,*
We propose a metal-media-metal reflective cell structure to construct a coded metasurface. The metal material is gold, the medium material is polyimide, and the frequency range of operation is 0.2 THz-0.8 THz. Using the Pancharatnam-Berry phase principle, the continuous change of reflection phase is realized by rotating the anisotropic strip structure. We designed 4 unit structures with phase intervals of 90°. They are arranged in a certain sequence into a phase-gradient array to construct a coded metasurface reflection structure. Through different coding sequences, different abnormal reflection angles can be realized. By using the full wave simulation method, we calculated the scattering angles and scattering efficiency of different sequences. In order to realize the continuous control of the angle of reflection and scattering, we introduce the Fourier code addition principle in digital signal processing. By adding different sequences of encoded particles, a new encoding sequence can be obtained, and the scattering angle can be controlled freely.
Metasurface, Metamaterials, Optics devices.
BIN LOU, JIANFENG XU, FUHAI LIU, LIZHEN XU, BO FANG, Scattering control based on geometric phase reflection-type coded metasurface, Optoelectronics and Advanced Materials - Rapid Communications, 18, 3-4, March-April 2024, pp.113-119 (2024).
Submitted at: Oct. 18, 2023
Accepted at: April 8, 2024
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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