Adaptive infrared camouflage based on quasi-photonic crystal with [formula omitted

Abstract

In this study, a novel adaptive infrared (IR) camouflage film based on one-dimensional (1D) quasi-photonic crystal (PC) with phase-change material Ge2Sb2Te5 (GST), is theoretically demonstrated. The designed film shows high emissivity state at low temperature and low emissivity state at high temperature, via the transition between amorphous and crystalline phase of GST. Moreover, the quasi-PC structure, designed with top optimized layers, possesses low emissivity property by splicing constructive interference (CI) peaks. In particular, the designed quasi-PC film is more conducive to the IR camouflage with variable object temperature (To), compared to those with static emissivity. This study provides a significant pathway to 1DPC application for adaptive IR camouflage and other technologies that rely on controlling the transfer of thermal radiation.