Optical properties of nonstoichiometric ZrO x according to spectroellipsometry data

• Published in: Optics and spectroscopy Vol. 121; no. 2; pp. 241 - 245
• Main Authors: Kruchinin, V. N., Aliev, V. Sh, Gerasimova, A. K., Gritsenko, V. A.
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01-08-2016
• Subjects: Chemical synthesis; Electromagnetic absorption; Ion beam sputtering; Optical properties; Oxygen; Polynomials; Spectroellipsometry; Zirconium
• ISSN: 0030-400X; 1562-6911
• DOI: 10.1134/S0030400X16080099

Amorphous nonstoichiometric ZrOx films of different composition have been synthesized by the method of ion-beam sputtering deposition of metallic zirconium in the presence of oxygen at different partial oxygen pressures in the growth zone, and their optical properties have been studied in the spectral range of 1.12–4.96 eV. It is found that light-absorbing films with metallic conductivity are formed at the partial oxygen pressure below 1.04 × 10–3 Pa and transparent films with dielectric conductivity are formed at the pressure above 1.50 × 10–3 Pa. It is shown that the spectral dependences of optical constants of ZrOx films are described well by the corresponding dispersion models: the Cauchy polynomial model for films with dielectric conductivity and the Lorentz–Drude oscillator model for films with metallic conductivity.