Chen Yuanlin, Zhu Beilin, Li Yulian, Long Wenxiao, Jiao JIajia, Yu Chenhui, An Bowen
Opt Express. 2025 Mar 10;33(5):11011-11021. doi: 10.1364/OE.553731.
A multispectral-compatible camouflage device with effective thermal management is proposed, which consists of seven thin films with five materials (Si, Ge, SiO, GST and Al). Within the visible spectrum (380-780 nm), the structural color of the device can be controlled by altering the thickness of the top Si layer, allowing it to adapt to diverse environmental backgrounds. Within the infrared spectrum, the average emissivity in the atmospheric window of 3-5 μm and 8-14 μm is as low as 17.7% and 23.0% respectively. However, it is as high as 65.7% in the non-atmospheric window 5-8 μm, which can realize effective thermal management with a net radiative cooling power of 500 W/m at an ambient temperature of 300 K and a working temperature of 350 K. For laser radar camouflage, it has a narrowband high emissivity of 81.3%, 84.8% and 81.4% at 1.06 μm, 1.55 μm and 10.6 μm respectively. Additionally, the device has excellent angular and polarization insensitivity. Using a simple film structure to realize multispectral camouflage and efficient thermal management guides coordinated control of electromagnetic waves and heat, which has wide implications in industrial manufacturing and military camouflage fields.
提出了一种具有有效热管理功能的多光谱兼容伪装装置，它由含有五种材料（硅、锗、二氧化硅、硫系玻璃和铝）的七层薄膜组成。在可见光谱（380 - 780纳米）范围内，该装置的结构颜色可通过改变顶部硅层的厚度来控制，使其能够适应各种环境背景。在红外光谱范围内，该装置在3 - 5微米和8 - 14微米大气窗口的平均发射率分别低至17.7%和23.0%。然而，在5 - 8微米的非大气窗口中，其发射率高达65.7%，在环境温度为300K、工作温度为350K时，可实现500W/m²的净辐射冷却功率的有效热管理。对于激光雷达伪装，它在1.06微米、1.55微米和10.6微米处分别具有81.3%、84.8%和81.4%的窄带高发射率。此外，该装置具有出色的角度和偏振不敏感性。利用简单的薄膜结构实现多光谱伪装和高效热管理，为电磁波与热的协同控制提供了指导，在工业制造和军事伪装领域具有广泛的意义。
