A Study of the Optical Properties of Barium Selenide Crystals. I. Fundamental Functions

Abstract

The full complex of 18 fundamental optical functions describing a barium selenide crystal was obtained in the spectral range of 0–40 eV. Their main features and general laws were established. Calculations were performed using a series of computer programs based on the Kramers–Kronig integral relations, the Taft–Philippe extrapolation model, and experimental reflectance spectra in the regions of 3.0–5.5 eV at 2 K and 3–40 eV at 77 K.