Multispectral camouflage for infrared, visible, lasers and microwave with radiative cooling

• DOI: 10.1038/s41467-021-22051-0
• Publication Date: 2021-03-22T11:03:43Z
• Authors: Huanzheng Zhu; Qiang Li; Chenning Tao; Yu Hong; Ziquan Xu; Weidong Shen; Sandeep Kaur; Pintu Ghosh; Min Qiu
• Keywords: Camouflage; Infrared window; Radiative Cooling

Interminable surveillance and reconnaissance through various sophisticated multispectral detectors present threats to military equipment manpower. However, a combination of operating in different wavelength bands (from hundreds nanometers centimeters) based on principles raises challenges the conventional single-band camouflage devices. In this paper, is demonstrated for visible, mid-infrared (MIR, 3-5 8-14 μm), lasers (1.55 10.6 μm) microwave (8-12 GHz) with simultaneous efficient radiative cooling non-atmospheric window (5-8 μm). The device consists ZnS/Ge multilayer selective emission Cu-ITO-Cu metasurface absorption. comparison broadband low emittance material (Cr), IR performance manifests 8.4/5.9 °C reduction inner/surface temperature, 53.4/13.0% signal decrease mid/long bands, at 2500 W ∙ m-2 input power density. Furthermore, we reveal that natural convection atmosphere can be enhanced by radiation window, which increases total from 136 252 150 surface temperature. This work may introduce opportunities manipulation, infrared processing, thermal management, energy-efficient applications.