Wu Pinghui, Zhang Congfen, Tang Yijun, Liu Bin, Lv Li
Research Center for Photonic Technology, Fujian Key Laboratory for Advanced Micro-nano Photonics Technology and Devices & Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China.
College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
Nanomaterials (Basel). 2020 Mar 8;10(3):488. doi: 10.3390/nano10030488.
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, SiO, 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.
提出了一种简单的超材料吸收器，以在可见光和近红外波长实现近乎完美的吸收。该吸收器由金属-电介质-金属（MIM）三层结构组成。这三层结构的材料分别是金、二氧化硅和金。吸收器的顶部金属结构由周期性规则排列的中空三维金属环组成。结果表明，在特定波长下的高吸收效率主要归因于电介质介质中间层中法布里-珀罗效应（FP）的共振，导致共振光被困在中间层，从而提高了吸收效率。几乎完美的多波段吸收，与偏振角无关且对入射角不敏感，赋予了该吸收器在滤波和光电子学方面巨大的应用前景。
