Effect of Ge concentration on optical properties of films synthesized by vacuum-thermal evaporation of glassy Ge–Se alloys

Aleksandrovich, E.V.; Aleksandrovich, A.N.; Mikheev, K.G.; Mikheev, G.M.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 февраля 2024 г.

Авторы: Aleksandrovich Elena V., Aleksandrovich Aleksandr N., Mikheev Konstantin G., Mikheev Gennady M.
Журнал: Journal of Non-Crystalline Solids
Том: 616
Год издания: 2023
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 122479
Последняя страница: 122489
DOI: 10.1016/j.jnoncrysol.2023.122479
Аннотация: Four non-crystalline GexSe100−x (x = 15−25 at. %) films were obtained by vacuum-thermal deposition of glassy Ge–Se alloys. With the use of spectroscopic ellipsometry, it was determined that the films are semiconductors with indirect band gap energy Eg = 2.0−2.07 eV. An anomalous dispersion of the refractive index n (λ) with nmax at λmax depending on x was revealed in the films at λ = 240−500 nm. It was established that as the concentration of Ge decreases, nmax increases, and λmax red shifts. Based on the Wemple-DiDomenico model, the nonlinear coefficients χ(3) and n2 characterizing the synthesized films were calculated as a function of x. The highest χ(3) and n2 values are achieved in the films at x = 15 at. %. The results obtained can be used for the development and creation of Ge–Se optical filters with an adjustable blue absorption band edge.
Добавил в систему: Александрович Елена Викторовна

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Effect of Ge concentration on optical properties of films synthesized by vacuum-thermal evaporation of glassy Ge–Se alloysстатья Исследовательская статья

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