亚波长人工超构材料可以实现特定波长的近完美吸收，在红外光电器件应用中能够克服传统红外材料吸收效率低、厚度较大、工作波长受限于带隙等缺陷.本文利用金属/介质/金属结构构造了一种可大面积制备的亚波长结构，可以实现1-10 μm波段内的双波段红外超吸收.通过时域有限差分法模拟和实验分析，我们认为该吸收器高频的吸收峰，主要来源F-P共振干涉增强吸收；而低频红外波段的吸收峰，主要得益于电偶极共振和磁共振模式的激发.利用退火工艺调节上层金颗粒的大小，可以有效地调节两个吸收峰的位置.

The sub-wavelength artificial metamaterials which demonbstrate nearly-perfect absorption of a specific wavelength can overcome the defects of low absorption efficiency, large thickness, and working wavelength limitation of band gap in the infrared photoelectric device application. In this paper, a metal/medium/metal structure is used to construct a sub-wavelength structure that can be prepared over a large area, which can achieve dual-band infrared perfect absorption in the 1-10 μm band. Through analyzing the results of Finite-Difference Time-Domain simulation and experiment, we believe that the high-frequency absorption peak of the absorber is mainly derived from FP resonance interference enhanced absorption; while the absorption peak in the low-frequency infrared band is mainly due to the excitation of the electric dipole resonance and the magnetic resonance mode. By adjusting the size of the upper layer of gold particles in the way of annealing, the positions of the two absorption peaks can be effectively regulated.