Dynamic multi-band camouflage and thermal management based on In3SbTe2

With advancements in multispectral detection technologies, the use of multiband camouflage has emerged as an effective solution for addressing the challenges posed by advanced reconnaissance and surveillance systems. Furthermore, emissivity modulation is essential for improving the effectiveness of infrared camouflage, especially in complex environments. This study presents a tunable multiband-compatible laser camouflage system featuring a layered configuration consisting of ZnS/Ge/MgF₂/Ge/IST/W. This structure shows excellent camouflage performance across various spectral bands, including visible light, near-infrared, mid-wave infrared (3–5 μm), and long-wave infrared (8–14 μm), as well as at laser detection wavelengths of 1.06 μm and 1.54 μm, both before and after the IST phase transition. The emissivity modulation of the non-atmospheric window (NAW) band is achieved by controlling the phase state of the phase-change material IST. In its crystalline state, the NAW band exhibits increased emissivity, which aids in heat dissipation and cooling when the target temperature exceeds the background temperature. Conversely, when the background temperature exceeds the target temperature, the structure shifts to an amorphous state, leading to reduced NAW emissivity that minimizes thermal loss. This adjustment allows the target temperature to align more closely with the environment, thereby enhancing camouflage effectiveness. Through thermal imaging simulations of the two phase-change states, this study clearly illustrates the camouflage capabilities of the structure over a range of temperatures, emphasizing its significant potential for adaptive multiband camouflage. This tunable system showcases impressive flexibility in adapting to environmental changes, presenting diverse applications for multiband-compatible camouflage systems.