title: Composition-dependent photosensitivity in As-S glasses induced by bandgap light: structural origin by Raman scattering.
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.
authors.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
authors.forename: Spyros N
authors.initials: SN
authors.lastname: Yannopoulos
authors.forename: Fotis
authors.initials: F
authors.lastname: Kyriazis
authors.forename: Ioannis P
authors.initials: IP
authors.lastname: Chochliouros