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Gamma ray irradiation induced optical band gap variations in chalcogenide glasses

Xia, F.ORCID: 0000-0002-4950-3640, Baccaro, S., Zhao, D., Falconieri, M. and Chen, G. (2005) Gamma ray irradiation induced optical band gap variations in chalcogenide glasses. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 234 (4). pp. 525-532.

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In the present work γ-irradiation induced optical band gap variations (ΔEopt) were investigated on Ge–As–Se and Ge–As–Se–Te chalcogenide glasses. Higher doses of γ-irradiation resulted in decreased Eopt, which was composition dependent. Especially, glasses with stoichiometric compositions showed different ΔEopt from nonstoichiometric glasses under the same irradiation conditions. There seemed existence of a threshold Eopt (TE) under the certain dose of irradiation below which ΔEopt hardly occurred. Results were interpreted from viewpoint of glass structure, Chemical Bond Approach (CBA) and localized states density theory. Raman analysis supported well these discussions.

Item Type: Journal Article
Publisher: North-Holland Publ Co
Copyright: © 2005 Elsevier B.V.
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