期刊
NANOMATERIALS
卷 10, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/nano10030488
关键词
broadband; metamaterial; perfect absorber; four-band absorption; COMSOL; surface plasmon polariton
类别
资金
- National Natural Science Foundation of China [11704223, 11747099]
- Natural Science Foundation of Fujian Province [2018J05008, JZ160459]
- Ph.D. Research Startup Foundation of Quanzhou Normal University [G16057, H19034]
- Distinguished Young Scholars Program Fujian Province [C18032]
A simple metamaterial absorber is proposed to achieve near-perfect absorption in visible and near-infrared wavelengths. The absorber is composed of metal-dielectric-metal (MIM) three-layer structure. The materials of these three-layer structures are Au, SiO2, and Au. The top metal structure of the absorber is composed of hollow three-dimensional metal rings regularly arranged periodically. The results show that the high absorption efficiency at a specific wavelength is mainly due to the resonance of the Fabry-Perot effect (FP) in the intermediate layer of the dielectric medium, resulting in the resonance light being trapped in the middle layer, thus improving the absorption efficiency. The almost perfect multiband absorption, which is independent of polarization angle and insensitivity of incident angle, lends the absorber great application prospects for filtering and optoelectronics.
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