4.5 Article

Dual band visible metamaterial absorbers based on four identical ring patches

Journal

Publisher

ELSEVIER
DOI: 10.1016/j.physe.2020.114526

Keywords

Metamaterial; Perfect absorber; Dual band; SPP; FEM

Funding

  1. National Natural Science Foundation of China [11704223]
  2. Natural Science Foundation of Fujian Province [2018J05008, 2018J01559, JAT170469]
  3. Quanzhou high level Talents Innovation and Entrepreneurship Project [2018C088R]
  4. Southwest University of Science and Technology University Student Innovation Fund Project Precision Funding Special Funding [JZ20-025]
  5. Scientific Research Fund of SiChuan Provincial Science and Technology Department [2020YJ0137]
  6. Southwest University of Science and Technology [CX20-031]

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The study introduces a dual-frequency tunable ideal visible light metamaterial absorber that achieves perfect absorption in the visible light band with a 99.9% absorption rate, regardless of polarization angle and incident angle.
This paper proposes a dual-frequency tunable ideal visible light metamaterial absorber based on the subwavelength range, which achieves perfect absorption in the visible light band. The absorber consists of an Au reflector and a nodal (SiO2) layer, and a top Au absorber layer. The absorption structure on the top of the absorber adopts the style of ancient Chinese coins and forms a square arrays structure. As a result, the absorber's two absorption peaks are perfect absorption peaks, and the absorption rate can reach 99.9%. In addition, we also researched the influence of adjusting the absorber's geometric parameters on the absorber, and analyzed the absorption mechanism under different circumstances. Through research, it can be known that the absorber has near-perfect dual-band absorption characteristics that do not depend on polarization angle and incident angle insensitivity. Therefore, the absorber designed by us will have a broad application prospect in the filter, solar cell, and so on.

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