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Laser-induced changes in the optical characteristics of amorphous films of the As-Sb-S system

Authors: Rubish, Vasyl Mykhajlovych; Pop, Mykhaylo Mykhaylovych; Mykaylo, Oksana Andriivna; Kryuchyn, Andriy Andriyovych; Maryan, Victor Mykhajlovych; Durkot, Myron Oleksiyovych; Yasinko, Tamara Ivanyvna; +2 Authors

Laser-induced changes in the optical characteristics of amorphous films of the As-Sb-S system

Abstract

The optical transmission spectra of amorphous As40-xSbxS60 films with small antimony content (x=0, 0.8, 1.6, 4, 6) prepared by the thermal evaporation of glasses of corresponding compositions have been measured over the whole 400-750 nm spectral range. It is established that the laser irradiation and annealing of films leads to an absorption edge shift into the long-wave spectral region. The values of pseudoforbidden gap width Eg and refractive index n of films have been determined. The parameters of a single-oscillator model (oscillator energy E0, dispersion energy Ed, and effective coordination number per cation Nc) for the studied films are estimated. The maximum changes in optical characteristics are found for As36Sb4S60 films. Changes in the optical parameters of films are caused by structural transformations taking place in them under the irradiation and annealing.

В спектральной области 400-750 нм исследованы спектры пропускания аморфных пленок As40-xSbxS60 с небольшим содержанием сурмы (x=0, 0.8, 1.6, 4.6) полученных термическим испарением стекол соответствующих составов. Установлено, что лазерное облучение и отжиг пленок приводит к сдвигу края поглощения в длинноволновую область спектра. Определены значения ширины псевдозапрещенной зоны Ed и показателя преломления n пленок. Рассчитаны параметры одноосциляторной модели (энергия осциллятора E0, дисперсионная энергия Ed и эффективное координационное число). Максимальные изменения оптических характеристик наблюдались в пленках As36Sb4S60. Изменения оптических параметров пленок обусловлены структурними превращениями, происходящими в них при облучении и отжиге.

В спектральній області 400-750 нм досліджені спектри пропускання аморфних плівок As40-xSbxS60 з малим вмістом Sb (х=0, 0.8, 1.6, 4, 6), одержаних методом термічного випаровування стекол відповідних складів на скляні підкладки. Встановлено, що лазерне опромінення та відпал плівок призводять до зсуву краю поглинання в довгохвильову ділянку спектру. Визначені ширина псевдозабороненої зони Egта показник заломлення n плівок. Розраховані параметри одноосциляторної моделі (енергія осцилятора E0, дисперсійна енергія Edта ефективне координаційне число Nc). Максимальні зміни оптичних характеристик виявлені для плівки As36Sb4S60. Зміни оптичних параметрів плівок відбуваються в них при опроміненні та відпалі. 

Keywords

Халькогенидные аморфные пленки; Спектры пропускания; Фотоиндуцированные эффекты; Оптические свойства; Структурные превращения, Халькогенідні аморфні плівки; Спектри пропускання; Фотоіндуковані ефекти; Оптичні властивості; Структурні перетворення, Chalcogenide amorphous films; Transmission spectra; Photoinduced effects; Optical properties; Structural transformations, 536.669:537.363:004.08

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
gold