Photonic response and temperature evolution of SiO₂/TiO₂ multilayers.

ABSTRACT: The microstructural and optical reflectivity response of photonic SiO₂/TiO₂ nanomultilayers have been investigated as a function of temperature and up to the material system's melting point. The nanomultilayers exhibit high, broadband reflectivities up to 1350 °C with values that exceed 75% for a 1 μm broad wavelength range (600-1600 nm). The optimized nanometer sized, dielectric multilayers undergo phase transformations from anatase TiO₂ and amorphous SiO₂ to the thermodynamically stable phases, rutile and cristobalite, respectively, that alter their structural morphology from the initial multilayers to that of a scatterer. Nonetheless, they retain their photonic characteristics, when characterized on top of selected substrate foils. The thermal

SUBMITTER: Christidis G 

PROVIDER: S-EPMC8550000 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature