Open AccessOptical Absorption of Chalcogenide Glass Ga2S3-La2S3 Doped with Erbium
Author(s) -
V. V. Halyan,
A. H. Kevshyn,
І. А. Іващенко,
І.D. Olekseuk,
I.V. Danyliuk,
A. P. Shavarova
Publication year - 2017
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.18.3.342-346
Subject(s) - chalcogenide , materials science , doping , absorption (acoustics) , erbium , band gap , analytical chemistry (journal) , absorption spectroscopy , chalcogenide glass , mineralogy , optics , chemistry , optoelectronics , composite material , physics , chromatography
The glasses of the La2S3–Er2S3–Ga2S3 system were synthesized from the melted samples which where quenched in to the cold 25-% solution of NaCl. Their optical absorption spectra were studied in the range of 1.2–2.9 eV at 80 K. For doped erbium glasses, there are narrow absorption bands with maxima at 2.53, 2.35, 2.27, 1.88, 1.54, 1.26 eV. With increasing of the content of La2S3 (30 - 40 mol. %) the bandgap width decreases (Eg = 2.83 - 2.73 eV) and the Urbach parameter increases (DE = 151 - 238 meV). These changes are determined by the structural disorder in the glasses.