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

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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.

© 2011 Optical Society of America

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