Composition-dependent photosensitivity in As-S glasses induced by bandgap light: structural origin by Raman scattering |
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Authors: | Yannopoulos Spyros N Kyriazis Fotis Chochliouros Ioannis P |
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Affiliation: | Foundation for Research and Technology-Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), Rio-Patras, Greece. sny@iceht.forth.gr |
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Abstract: | Massive photoinduced short- and medium-range structural changes (photopolymerization) in As-S glasses are induced by near-bandgap light and studied by Raman scattering. Structural changes involve bond restructuring in sulfur-rich nanodomains of these nanoscale-phase-separated glasses. The spectral dependence of the photopolymerization effect demonstrates that various wavelengths can be used to optically change the structure of As-S glasses. The immense structural changes are relevant to recent findings about the role of bandgap light illumination for fabricating channel waveguides in noncrystalline arsenic sulfides. |
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