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Transmission characteristics of multilayer metal polarization insensitive metasurface

GUANJUN FENG1, CHEN WANG2, YUMING LIN3, MINGFENG ZHENG4, MANNA GU5,* , FUHAI LIU6, YONG TAO4, YANLING LI7, YING TANG2,8, YING TIAN2

Affiliation

  1. Zhejiang Tongji Vocational College of Science and Technology, Hangzhou, 311231, China
  2. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China
  3. Hangzhou Xio Elevator Modernization Update Co., LTD, China
  4. Geely Automotive Institute, Hangzhou Vocational and Technical College, Hangzhou, 310018, China
  5. College of Information Engineering, China Jiliang University, Hangzhou 310018, China
  6. Special Equipment Institute, Hangzhou Vocational and Technical College, Hangzhou 310018, China
  7. Jiaxing Nanhu University, Jiaxing, China
  8. Nanhu Laboratory, Jiaxing, China

Abstract

A polarization insensitive encoding Huygens metasurface is proposed. A multilayer symmetric metal structure is proposed to construct a transmission-coded metasurface because the single-layer metal structure cannot realize the all-phase control of the unit structure. In order to optimize the design of the eight element structures with the abrupt phase interval of π/4 and high transmittance, three different structures of square, circular and circular metal patches were optimized to construct the unit structures. The phase of the periodic element structure was changed by changing the length of the square metal patch, the size of the inner and outer frame of the circular metal patch and the radius of the circular metal patch. Based on the S-parameter inversion algorithm, we calculated the effective impedance, dielectric constant and effective permeability of the three cell structures, which provides the physical mechanism basis for the interpretation of beam regulation of coded metasurface. In order to realize the beam control characteristics of Huygens coded metasurface, we first arrange the optimally designed unit structures into an ordered array structure. The near-field and far-field scattering characteristics of coded arrays are calculated by finite element method. In order to further realize the free regulation of far-field scattered beam, Fourier convolution principle in digital signal processing is introduced. Fourier convolution addition operation is carried out on two different coded metassurface sequences to realize the free regulation of scattered beam..

Keywords

Scattering, Microstructure, Metamaterials, Surface.

Submitted at: Dec. 11, 2024
Accepted at: June 4, 2025

Citation

GUANJUN FENG, CHEN WANG, YUMING LIN, MINGFENG ZHENG, MANNA GU, FUHAI LIU, YONG TAO, YANLING LI, YING TANG, YING TIAN, Transmission characteristics of multilayer metal polarization insensitive metasurface, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 5-6, pp. 219-236 (2025)