Abstract:In order to achieve infrared stealth under different background temperatures, it is necessary to study infrared stealth materials with adjustable emissivity. In addition, multi-band compatible stealth technology has important research value in modern mili-tary, science and technology. In this paper, a metamaterial absorber with a single multi-layer structure is designed to realize efficient multi-spectral manipulation. Ge2Sb2Te5 (GST) is a phase-changing material. Crystalline GST and amorphous GST have different infrared electromagnetic properties. Utilizing this property of GST, the maximum absorptivity of the designed structure can be controlled from 94.93% to 9.19% in the wavelength range of 8~13 μm. Moreover, the intermediate GST can be obtained by controlling the external conditions, and the absorptivity of the structure to the electro-magnetic wave can be changed continuously. At the same time, the structure has tunable structure color based on interference effect, and the surface color of the device can be tuned by changing the thickness of the top film. Therefore, the independent tuning of electromagnetic wave in both infrared and visible bands is realized at the same time. The metamaterial absorber has the potential application of infrared-visible compatible stealth.
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