Liu Shiju, Zhou Congyang, Tan Ruiyang, Han Mengqi, Wu Zhijing, Chen Ping
Nanjing University, Nanjing, China.
Suzhou Laboratory, Suzhou, China.
Nanophotonics. 2025 May 1;14(12):2173-2186. doi: 10.1515/nanoph-2025-0024. eCollection 2025 Jun.
Nature can significantly inspire humans. Chameleons, jellyfish, and many other creatures use unique camouflage methods. Multispectral camouflage materials are highly desirable to against progressive multispectral detection. The proposed structure should be simple and highly transparent to ensure a wide application range. In this study, a bio-inspired multispectral camouflage material with visible transparency, microwave diffusion, and infrared (IR) camouflage was designed, fabricated, and tested. Multispectral camouflage performance was achieved on a single metasurface by the following steps: First, a nanoscale multilayered film consisting of an oxide and metal was unitized to achieve a low IR emissivity and high visible transmittance. Then, two units were designed to obtain a phase difference, thus realizing the microwave diffusion performance. Based on the relationship between the area filling fraction and IR emissivity, the units can perform puzzled imaging under an IR thermal camera. The structural parameters were calculated and optimized through an equivalent circuit model-based artificial intelligence algorithm. Then, a 10 dB reduction in radar cross section from 7 GHz to 16 GHz, a puzzled IR thermal image, and a high optical transmittance (>0.7) were achieved. The work provides significant guidance for the design and fabrication of multispectral camouflage materials.
大自然能给人类带来极大的启发。变色龙、水母以及许多其他生物都采用独特的伪装方法。多光谱伪装材料对于抵御渐进式多光谱探测非常必要。所提出的结构应简单且具有高透明度，以确保广泛的应用范围。在本研究中，设计、制备并测试了一种具有可见光透明度、微波散射和红外（IR）伪装功能的仿生多光谱伪装材料。通过以下步骤在单个超表面上实现了多光谱伪装性能：首先，将由氧化物和金属组成的纳米级多层膜单元化，以实现低红外发射率和高可见光透射率。然后，设计两个单元以获得相位差，从而实现微波散射性能。基于面积填充率与红外发射率之间的关系，这些单元在红外热像仪下可呈现迷惑性成像。通过基于等效电路模型的人工智能算法计算并优化了结构参数。然后，在7吉赫兹至16吉赫兹频段实现了雷达散射截面积降低10分贝、获得了迷惑性红外热图像以及高光学透射率（>0.7）。这项工作为多光谱伪装材料的设计和制备提供了重要指导。
