Optical properties of silver containing As–S–Se thin films
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The As33S67- y Se y , where y = 0, 16.75, 33.5, 50.25 and 67, amorphous thin films were prepared by vacuum thermal evaporation technique. Range of the silver content dissoluted in films was x = 0 – 25 at. %. The refractive index increase with increasing silver and selenium content. The difference of the refractive index (Δn) between undoped and silver doped films was ∼ 0.4 and between As33S67 and As33Se67 was films ∼ 0.42. The values of non-linear refractive index grow with increasing silver and selenium content. The difference of optical bandgap, ΔE g opt , between undoped As33S67 and fully dopped films with Ag and Se was ∼ 1 eV.
KeywordsChalcogenide Glass Silver Content Selenium Content Ag2Se Chalcogen
Financial support from the Research Centre of University of Pardubice and Institute of Inorganic Chemistry ASCR, Research Centre LC523, and Project VZ 0021627501 of Ministry of Education, Youth and Sports of Czech Republic, Grant Agency of Czech Republic Grant GA 203/05/524, 203/06/1368 are greatly acknowledged.
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