An infrared stealth superstructure compatible with thermovariable emissivity and frequency selective heat dissipation

Abstract

The invention discloses an infrared stealth superstructure compatible with thermally variable emissivity and frequency selective heat dissipation. The emissivity regulation layer and the dielectric layer of the invention, as well as several metal pillars periodically arranged on the dielectric layer; the emissivity regulation layer is made by embedding phase change material in the metal layer stacked on the substrate. The invention can realize the modulation of the emissivity in the atmospheric transmission window: 3-5 μm and 8-14 μm, and at the same time enhance the thermal radiation in the atmospheric absorption band of 5-8 μm to actively dissipate heat, and has a wide emissivity control range, which can adapt to a variety of infrared Stealth scene.

Description

technical field [0001] The invention belongs to the technical field of infrared stealth, and in particular relates to an infrared stealth superstructure compatible with thermally variable emissivity and frequency selective heat dissipation. Background technique [0002] For most biological and working instruments, the surface temperature is between 20-900°C, according to Wien's displacement law (λT=b, where λ is wavelength, T is temperature, b is Wien's constant, b=0.002897m ·K), the thermal radiation peak will be distributed at 3-14 μm. However, the 3-5 μm and 8-14 μm bands are atmospheric transmission windows, and the infrared radiation in the windows can easily pass through the atmosphere and be detected by thermal cameras. Radiation contrast enables target identification in thermal imaging when there is a difference in radiation intensity between the target and the surrounding environment. How to integrate the target with the surrounding environment to avoid infrared t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the two problems of poor thermal stability and lack of emissivity modulation ability of traditional low-emissivity materials, combining metal resonant metamaterials and VO 2 Equal phase change materials, by designing the material composition of each dielectric layer of the metamaterial and controlling the structural size, an infrared stealth metasurface device compatible with thermally variable emissivity and frequency selective thermal emission is provided

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