Flexible and transparent visible-infrared-compatible stealth film based on ITO/Ag/ITO configuration

The infrared (IR) stealth and visible stealth have different spectral response requirements, resulting in the difficulty in the coordination of the design of multispectral compatible stealth material, so it is necessary to develop selective regulation technologies of optical properties. Based on an ITO/Ag/ITO stacked film structure integrating induced transmission, radiation suppression, and other optical synergistic effects, a new type of superstructured thin film material with transparent infrared stealth was proposed. A collaborative design method integrated with high visible transmission and low IR radiation was established, the influence mechanism of microstructure characteristics on visible transmission spectrum and IR reflection spectrum was interpreted, then the design of highly transparent infrared stealth material was optimized, and its compatible stealth performance was tested and characterized. Research showed that visible transmission was contingent upon the coupling and matching between the semiconductor layer and the metal layer, while the IR radiation suppression mainly depended on the metal layer. The optimized ITO/Ag/ITO superstructured film with a thickness of 40/12/40 nm possesses high background perspective reproduction, high-temperature IR radiation suppression, and high flexible conformal ability with curved surface. The research results can provide indispensable technical support for the design and application of multispectral compatible stealth material.