title: Optical and Vibrational Spectra of CsCl-Enriched GeS2-Ga2S3 Glasses.
abstract: Optical and FTIR spectroscopy was employed to study the properties of 80GeS2-20Ga2S3-CsCl chalcohalide glasses with CsCl additives in a temperature range of 77-293 K. It is shown that CsCl content results in the shift of fundamental absorption edge in the visible region. Vibrational bands in FTIR spectra of (80GeS2-20Ga2S3)100 - х (СsCl) x (x = 5, 10, and 15) are identified near 2500 cm(-1), 3700 cm(-1),, around 1580 cm(-1), and a feature at 1100 cm(-1). Low energy shifts of vibrational frequencies in glasses with a higher amount of CsCl can be caused by possible thermal expansion of the lattice and nanovoid agglomeration formed by CsCl additives in the inner structure of the Ge-Ga-S glass.
authors.affiliation: Lviv Polytechnic National University, 12 Bandery str., Lviv, 79013, Ukraine. halyna.i.klym@lpnu.ua.
authors.forename: Halyna
authors.initials: H
authors.lastname: Klym
authors.affiliation: Department of Electronics, Ivan Franko National University of Lviv, 107 Tarnavskogo str., Lviv, 79017, Ukraine.
authors.forename: Ivan
authors.initials: I
authors.lastname: Karbovnyk
authors.affiliation: INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy.
authors.forename: Mariangela Cestelli
authors.initials: MC
authors.lastname: Guidi
authors.affiliation: Lublin University of Technology, 38A ul. Nadbystrzycka, 20-618, Lublin, Poland.
authors.forename: Oleksandra
authors.initials: O
authors.lastname: Hotra
authors.affiliation: Institute for Solid State Physics, University of Latvia, Kengaraga 8, LV-1063, Riga, Latvia.
authors.forename: Anatoli I
authors.initials: AI
authors.lastname: Popov
keywords: Chalcogenide; Chalcohalide glass; Modification; Optical spectra; Vibrational properties