基于人工电介质“原子”的超材料完美吸收体。

Metamaterial perfect absorber based on artificial dielectric "atoms".

作者信息

Liu Xiaoming, Bi Ke, Li Bo, Zhao Qian, Zhou Ji

出版信息

Opt Express. 2016 Sep 5;24(18):20454-60. doi: 10.1364/OE.24.020454.

DOI:10.1364/OE.24.020454

Abstract

In this work, we numerically designed and then experimentally verified a metamaterial perfect absorber based on artificial dielectric "atoms". This metamaterial absorber is composed of dielectric ceramic material (SrTiO) "atoms" embedded in a background matrix on a metal plate. The dielectric "atoms" couple strongly to the incident electric and magnetic fields at the Mie resonance mode, leading to the narrow perfect absorption band with simulated and experimental absorptivities of 99% and 98.5% at 8.96 GHz, respectively. The designed metamaterial perfect absorber is polarization insensitive and can operate in wide angle incidence.

摘要

在这项工作中，我们通过数值设计并随后通过实验验证了一种基于人工电介质“原子”的超材料完美吸收体。这种超材料吸收体由嵌入金属板上背景基质中的介电陶瓷材料（SrTiO）“原子”组成。介电“原子”在米氏共振模式下与入射电场和磁场强烈耦合，导致在8.96 GHz处具有模拟吸收率99%和实验吸收率98.5%的窄完美吸收带。所设计的超材料完美吸收体对偏振不敏感，并且可以在宽角度入射下工作。