Photodarkening in Ge3Se17 glass

Authors present measurements of the kinetics of photodarkening in Ge3Se17 glass. The photodarkening is induced with sub-bandgap light and observed as transmission changes through a 1 mm thick sample of the glass. Both transient nonlinear and permanent processes are detected with these measurements....

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Veröffentlicht in:	Journal of non-crystalline solids 2000-09, Vol.274 (1-3), p.23-29
Hauptverfasser:	SCHARDT, Craig R, SIMMONS, Joseph H, LUCAS, Pierre, LE NEINDRE, Lydia, LUCAS, Jacques
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Fundamental areas of phenomenology (including applications) Light-sensitive materials Optical materials Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of bulk materials and thin films Optics Physics
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Beschreibung
Zusammenfassung:	Authors present measurements of the kinetics of photodarkening in Ge3Se17 glass. The photodarkening is induced with sub-bandgap light and observed as transmission changes through a 1 mm thick sample of the glass. Both transient nonlinear and permanent processes are detected with these measurements. Authors consider the various sources that could lead to changes in sample optical properties and suggest that changes in electronic structure are the most reasonable explanation for the observed photodarkening. Comparison of the results with a model of light induced changes in amorphous Se leads to an explanation for these effects based on the formation of dynamical bonds during illumination. 15 refs.
ISSN:	0022-3093 1873-4812
DOI:	10.1016/S0022-3093(00)00200-3