Functional selective nanostructured coatings synthesized by low-temperature ion-plasma method on polymeric substrates

Abstract

The technology of low-temperature ion-plasma formation of the nanostructured films from the aluminum nitride on the various substrates, including the Mylar and Teflon flexible polymeric films was developed. The study of the structural and optical characteristics of such nanostructured coatings has shown the possibility to use them as the functional films with the selective transmissions and barriers in the infrared (IR) spectral region. Due to high thermal conductivity and specific optical properties (the Restrahlen band broadened from the wavelengths 10.3 μm up to almost 20 μm) and good transparency in visible and sub-THz spectral regions), the AlN thin polycrystalline films on polymeric substrates can be attractive for making the infrared radiation blocking filters from the background at 300 K. They can improve the performance of the sub-THz low-temperature detectors in the ground-based telescopes.