Layered structure capable of simultaneously realizing low laser reflection, low infrared radiation and high microwave absorption

Abstract

The invention provides a layered structure capable of simultaneously realizing low laser reflection, low infrared radiation and high microwave absorption. The layered structure is formed by compounding an all-metal metasurface array and a metamaterial wave absorber. The all-metal metasurface array can effectively reduce specular reflectance by controlling the reflection direction of incident laser, and low laser reflection and low infrared radiation are achieved at the same time in combination with the inherent low infrared radiation characteristic of metal materials. The metamaterial wave absorber located below the all-metal metasurface array can achieve high absorption of broadband microwaves. According to the invention, the all-metal metasurface and the metamaterial wave absorber are ingeniously combined, the specular reflectance within the wave band of 0.8-1.2 microns can be effectively reduced, very low infrared emissivity is kept in infrared atmospheric windows (3-5 microns and 8-14 microns), high absorption of 6.5-13.4GHz microwaves is achieved at the same time, and multi-band electromagnetic characteristic regulation and control are achieved.

Description

technical field [0001] The invention relates to the technical field of multi-band electromagnetic wave regulation, in particular to a layered structure that realizes low laser reflection, low infrared radiation and high microwave absorption at the same time Background technique [0002] With the continuous development of multi-spectral detection technology, active detectors are often used in combination with passive detectors. For active detectors, the purpose of detection is achieved by capturing the reflected signal of the object, so the material is required to have high absorption and low reflection characteristics for electromagnetic waves. The working wavelengths of laser detection equipment mainly include 0.93 μm, 1.06 μm, 1.54 μm, and 10.6 μm, of which the two wavelengths of 1.06 μm and 10.6 μm are the most important. To achieve invisibility to passive detectors such as thermal infrared detectors, materials with low absorption and high reflectivity are required. In ...

AI Technical Summary

Problems solved by technology

To realize the invisibility of the two detection methods at the same time, it is already necessary to face many contradictions, for example: to realize the invisibility of microwave and infrared at the same time, the contradiction lies in the different performance requirements of materials in different electromagnetic wave bands; To achieve simultaneous invisibility to laser and infrared, the contradiction is that in the same electromagnetic band, materials often need to have diametrically opposite properties

However, it will be more difficult to simultaneously realize the invisibility of objects to the three detectors.

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