Refractive Index and Extinction Coefficient of Vapor-deposited Water Ice in the UV–vis Range

Abstract Laboratory results of the optical properties vapor-deposited water ice, specifically refractive index and extinction coefficient, are available mainly for a selective set wavelengths limited number deposition temperatures. Experimental limitations main reason lack broadband data, which is unfortunate as these quantities needed to interpret predict astronomical planetary observations. The goal this work address lacking using an experimental method that capable rapidly providing reliable ice data across entire UV–visible range. This approach combines simultaneous use monochromatic HeNe laser Xe-arc lamp record interference fringes during at astronomically relevant thickness typically more than 20 μ m. Analyzing period intensity patterns combining both allows determination wavelength-dependent coefficient. We present accurate coefficient graphs between 250 750 nm ices deposited 30 160 K. From our we find possible structural change in 110–130 K region has not been reported before. also discuss presented paper can be used observations icy surfaces.