Irreversible photobleaching, photorefraction and photoexpansion in GeS2 amorphous film

0341644 - ÚMCH 2011 RIV CN eng J - Článek v odborném periodiku
Knotek, P. - Tichý, Ladislav - Arsova, D. - Ivanova, Z.G. - Tichá, H.
Irreversible photobleaching, photorefraction and photoexpansion in GeS2 amorphous film.
Materials Chemistry and Physics. Roč. 119, 1-2 (2010), s. 315-318. ISSN 0254-0584. E-ISSN 1879-3312
Výzkumný záměr: CEZ:AV0Z40500505
Klíčová slova: amorphous chalcogenide films * irradiation effects * optical band gap
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 2.356, rok: 2010

The photoinduced irreversible effects in amorphous GeS2 film were investigated. The magnitude of the photobleaching was found at around = 13% and it was discussed within the Davis-Mott model and within Taucś model for optical transitions in amorphous solids. Based on the optical measuremets and the Atomic Force Microscopy we also observed photoexpansion at around = 4.8% accompanied by a decrease in the refractive index from n = 2.02 for the virgin film to n = 1.94 for a film illuminated until a nearly steady state.
Trvalý link: http://hdl.handle.net/11104/0005827