Disk resonator metasurface emitter for infrared-laser compatible stealth with dual-band thermal management

Significant advancements have been made in multiband infrared detectors, making the integration of multiband infrared compatibility with stealth capabilities essential for counteracting multiband infrared detection. This paper introduces a multiband metamaterial selective thermal emitter featuring an Ag/TiO₂/Ag nanosandwich structure capable of achieving both infrared and laser-compatible stealth. Through the use of inherent absorption in lossy dielectrics, magnetic resonance properties of MIM structures, and coupling of propagating surface plasmons with Fabry-Pérot cavity resonances, the multiband infrared stealth compatibility is effectively controlled. The fabricated samples show low emissivity (ɛ _3-5 µm = 0.09, ɛ _8-14 µm = 0.54) in atmospheric windows, contributing to infrared stealth invisibility, and high emissivity (ɛ _2.5-3 µm = 0.50, ɛ _5-8 µm = 0.69) in non-atmospheric windows, facilitating radiative cooling. The sample exhibits lower surface temperatures compared to aluminum thin films, demonstrating superior thermal management. Additionally, high absorption at 1.55 µm (ɛ = 0.86) and 10.6 µm (ɛ = 0.94) is achieved due to the interference of the TiO₂ layer and its inherent loss characteristics, facilitating laser camouflage. Moreover, this study centers on a multiband selective thermal emitter based on a metasurface structure, offering significant potential for multiband infrared camouflage technology.