Color camouflage, solar absorption, and infrared camouflage based on phase-change material in the visible-infrared band

Abstract

In this paper, we design a sandwich multilayer film structure based on phase-change material Ge2Sb2Te5 (GST). In the visible band, based on the amorphous and crystalline state of GST, visible light absorption and color camouflage can be achieved. The transition between the amorphous and crystalline state of GST by temperature modulation can achieve dynamic color tuning without affecting the absorption. In the infrared band, the structure can realize the infrared camouflage function in the amorphous and crystalline states, which means that it has a higher reflection function in the infrared band. Therefore, the multilayer film based on the phase-change material GST has a simple structure and mature preparation process, which can be effectively compatible with the visible-infrared band to realize the multi-functions of color camouflage, visible light absorption and infrared camouflage.

Design and optimization of flexible metamaterials for microwave and infrared compatible stealth

“…According to the Stefan-Boltzmann law, the total radiant heat power is proportional to the fourth power of the surface temperature and the emissivity (P=εT 4 ). The radiation energy can be reduced by controlling the surface emissivity (metal film [8] , metamaterial [9,10] , photonic crystal [11,12] ) and surface temperature (phase change material [13][14][15] , thermal insulation material [16,17] ). The suppression of IR radiation energy means that the heat diffusion is reduced, resulting in heat accumulation [18,19] in the interior and the increase of temperature [20] , so that the IR stealth effect is weakened.…”

Long-Term Stable Thermal Emission Modulator Based on Single-Walled Carbon Nanotubes

“…It is of great scientific and practical interest to modulate a material’s optical properties, especially thermal emission in infrared (IR) regions, because of the emerging application demands in thermal camouflage , and radiative cooling. − The thermal emission of a surface is governed by the Stefan–Boltzmann law P = εσ T 4 , which is mainly dependent on the surface temperature, with the emissivity ε as the only material parameter that could be tailored. The conventional technique in altering the thermal emission is to use phase change materials − or photonic crystals − to selectively change the emissivity of the structures, but this technique could not realize the dynamic control due to their passive design and slow response in structural changes.…”

A tunable infrared emitter based on phase-changing material GST for visible-infrared compatible camouflage with thermal management

“…Li et al proposed multilayer composite film structures consisting of SiO 2 –Ge 2 Sb 2 Te 5 –SiO 2 –Al to achieve visible-infrared compatible camouflage. 38 However, they lack tunable infrared camouflage and radiation heat dissipation. Su et al prepared a visible and infrared camouflage coated fabric to reduce the infrared emissivity and gloss of the objects.…”

“…To date, visible-infrared compatible camouflage devices have been successfully developed by using plasmonic metamaterials, [30][31][32] photonic crystals, [33][34][35] multilayer film structures [36][37][38][39][40][41] and composites. [42][43][44] For instance, Wu et al proposed an optically transparent infrared emitter composed of a metalinsulator-metal nanostructure to achieve visible-infrared compatible camouflage and radiation heat dissipation.…”