VO2-based infrared selective emitter for self-adaptive infrared camouflage

Infrared (IR) camouflage, which is used to conceal objects in infrared vision for confrontation with infrared detection in civilian and military applications, is gathered interest increasingly. Here, the tunable selective emitter depended on temperature is proposed. When the temperature is below 341K, the emitter has low emissivity in 3-5μm and 8-14μm, and high emissivity in 5-8μm. The bandwidth with the emissivity above 50% is 3μm; With the temperature above 341K, the average emissivity in 3-14μm is 0.23, which can achieve excellent infrared camouflage. The maximum modulation depth of emissivity is 51.56%. It is believed that the emitter can explore further applications in thermal management, adaptive thermal camouflage and energy harvesting.