In this paper, a similar Fabry-Perot cavity structure utilizing a multilayer film structure consisting of an ultrathin metal film is demonstrated for absorbing the infrared ray. This structure has low emissivity in the atmospheric window (3–5 and 8–14 μm) and high emissivity in the nonatmospheric window (5–8 μm). These properties improved the stealth performance which causes the high emissivity in 5–8 μm to radiate more energy to reduce its temperature. Based on this, the periodic microstructures were added to the surface of the materials that enhanced the absorption of terahertz wave (0.1–2.7 THz). The absorber based on multilayer film has a simple structure and low manufacturing cost. This work may provide a new strategy for infrared and terahertz compatible stealth technology.

在本文中，展示了一种类似的Fabry-Perot腔结构，该结构利用由超薄金属膜组成的多层膜结构来吸收红外线。这种结构在大气窗口（3–5和8–14μm）中具有低发射率，在非大气窗口（5–8μm）中具有高发射率。这些特性改善了隐身性能，导致5–8μm的高发射率辐射更多能量以降低其温度。在此基础上，将周期性的微观结构添加到材料表面，从而增强了太赫兹波（0.1–2.7 THz）的吸收。基于多层膜的吸收体结构简单，制造成本低。这项工作可能为红外和太赫兹兼容的隐形技术提供新的策略。