Chen Han, Wang Han
Appl Opt. 2025 Apr 1;64(10):2586-2595. doi: 10.1364/AO.547018.
With the rapid development of infrared (IR) detection technology, the demand for IR camouflage in military reconnaissance and civilian fields is increasing. Although low-emissivity materials can accommodate high-temperature objects, they cannot allow temperature-variable objects to maintain infrared camouflage at all times in their environment. In this paper, a simple metamaterial structure is used to realize IR adaptive camouflage with a thermal switch. is used as a temperature-adaptive switch due to its dynamic modulation properties, which increases the emissivity of the tunable emitter to match the environment in a cold state. The metal phase, in contrast, decreases the emissivity to reduce the radiant energy and achieve IR camouflage. The emission enhancement mechanism of the tunable metamaterials is analyzed and revealed by the magnetic field diagram. The study of radiation power and temperature shows that the tunable infrared camouflage metamaterials can determine their high-emissivity/reflectivity optical properties through the thermal switch, thereby displaying a temperature that is proximate to the ambient and integrating into the environment in an infrared camera. In conclusion, the emitter provides a certain degree of assistance for the development and application of tunable emission devices with broadband in the mid-infrared range.
随着红外（IR）探测技术的快速发展，军事侦察和平民领域对红外伪装的需求日益增加。尽管低发射率材料可以适应高温物体，但它们无法使温度可变的物体在其环境中始终保持红外伪装。本文采用一种简单的超材料结构，通过热开关实现红外自适应伪装。由于其动态调制特性，被用作温度自适应开关，在冷态下增加可调谐发射器的发射率以匹配环境。相比之下，金属相降低发射率以减少辐射能量并实现红外伪装。通过磁场图分析并揭示了可调谐超材料的发射增强机制。对辐射功率和温度的研究表明，可调谐红外伪装超材料可以通过热开关确定其高发射率/反射率光学特性，从而在红外摄像机中显示出接近环境的温度并融入环境。总之，发射器为中红外范围内宽带可调谐发射器件的开发和应用提供了一定程度的帮助。
