The method of optical investigations of the nanostructural diamond-like a-C:N films

• Дата: 2007
• Автори: Kara-Murza, S.V., Belyaev, B.V., Gritskih, V.A., Zhikharev, I.V., Kortchikova, N.V., Naumenko, D.A., Prudnikov, A.M.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2007
• Назва видання: Functional Materials
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/136468
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: The method of optical investigations of the nanostructural diamond-like a-C:N films / S.V. Kara-murza, B.V. Belyaev, V.A. Gritskih, I.V. Zhikharev, N.V. Kortchikova, D.A. Naumenko, A.M. Prudnikov // Functional Materials. — 2007. — Т. 14, № 1. — С. 109-113. — Бібліогр.: 14 назв. — англ.

A complex technique has been proposed for optical investigations of nanostructured diamond-like a—C:N films. To determine the thickness d, refractive index no and extinction coefficient n₀, the refraction ellipsometry at fixed wavelength λ₀ = 632.8 nm with different incidence angles has been used. Proceeding from the n₀, K₀ and d values, the n(λ), K(λ) dependences have been restored basing on the optical transmission curves within the 280-1200 nm range, and, as a consequence, the dependence of the imaginary part of dielectric constant, ξ", on the photon energy near the fundamental absorption edge. The band gap width Eg and the Tauc coefficient B have been determined for the films obtained under various technological conditions and preliminary conclusions have been drawn for the contributions from sp² and sp³ phases depending on those conditions.