Self-Reversible Photodarkening of the Mixed GeS2–SbSI Glasses

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The subbandgap light induced bleaching and/or darkening in (GeS2) x –(SbSI)1−x (x=10,20) glasses were investigated by observing in situ transmission spectra. The light is capable of inducing darkening and/or bleaching depending on the GeS2 content. The self-reversible of metastable darkening occurs in the sample of higher GeS2 content at room temperature. The kinetics of dark decay can be described well by a stretched exponential function. The decay rate is significantly faster than for other chalcogenide glasses. The Raman scattering measurements reveal the origin of photoinduced structural changes.

Document Type: Research Article


Affiliations: 1: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China 2: Department of Materials Science & Engineering, Lehigh University, Bethlehem, Pennsylvania 18015

Publication date: June 1, 2011

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