An ultra broadband high-performance metamaterials absorber is designed based on the Fabry-Perot resonance effect and hybrid coupling theory. In this paper, we use the numerical method to analyze the absorption characteristics of the absorber under the conditions of wide band, different polarization states and large angle oblique incidence. The results reveal that the absorption band of the absorber is 300 nm–3000 nm, and its average absorption rate exceeds 93%. In addition, the absorptivity of the absorber is less affected by the polarization angle and incident angle of the incident light. The physical mechanism of wide-band high-absorption is analyzed, which is mainly caused by Fabry-Perot resonance, surface plasmon resonance, local surface plasmon resonance and the hybrid coupling among them. The proposed metamaterial absorber is expected to play a role in invisible devices, solar cells and other fields owing to its wide absorption bandwidth, high absorption, independent to polarization and stable at wide-angle of incidence.

基于法布里-珀罗共振效应和混合耦合理论，设计了一种超宽带高性能超材料吸收体。本文采用数值方法分析了宽带，不同偏振态和大角度斜入射条件下吸收体的吸收特性。结果表明，吸收体的吸收带为300 nm-3000 nm，平均吸收率超过93％。另外，吸收器的吸收率受入射光的偏振角和入射角的影响较小。分析了宽带高吸收的物理机理，主要是由法布里-珀罗共振，表面等离子体激元共振，局部表面等离子体激元共振以及它们之间的混合耦合引起的。