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Opt Lett. 2011 Feb 15;36(4):534-6. doi: 10.1364/OL.36.000534.

Composition-dependent photosensitivity in As-S glasses induced by bandgap light: structural origin by Raman scattering.

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Foundation for Research and Technology-Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), Rio-Patras, Greece.


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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