Abstract

The ever-growing demands on the functional and operational characteristics of optical thin-film coatings have motivated studies on the properties of films formed using new film-forming materials, including complex fluorides. Interest in such materials is particularly due to the need for coatings with low refractive indices and low optical losses within a wide spectral region. In this paper, we studied the optical properties (refractive indices n and extinction coefficients k) of films formed from complex fluorides, namely, BaY₂F₈, CaY₂F₈, SrY₂F₈, and MgBaF₄, which were obtained by the vacuum electron-beam evaporation method. The properties of these films were compared with the properties of films formed from simple fluorides, namely, BaF₂, CaF₂, SrF₂, YF₃, and MgF₂, which were obtained under the same evaporation conditions.

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