Light-induced NIR-absorption in Sr0.61Ba0.39Nb2O6:Ce at low temperatures

Autor(en): Greten, G
Kapphan, S
Pankrath, R
Stichwörter: charge transfer process; light-induced NIR-absorption; Nuclear Science & Technology; PHOTOREFRACTIVE PROPERTIES; Physics; Physics, Condensed Matter; Physics, Fluids & Plasmas; SBN:Ce
Erscheinungsdatum: 1995
Herausgeber: GORDON BREACH SCI PUBL LTD
Journal: RADIATION EFFECTS AND DEFECTS IN SOLIDS
Volumen: 135
Ausgabe: 1-4
Startseite: 693
Seitenende: 696
Zusammenfassung: 
Absorption measurements of Sr0.61Ba0.39Nb2O6:Ce under visible light (Ar+, -Kr+ laser or XBO-lamp) illumination show a light-induced broadband NIR-absorption with maximum at 1.6 mu m. This absorption is very pronounced at temperatures below 150 K. Its lineshape is similiar to the broadband absorption which is being observed in reduced SBN crystals. The time dependence of the light induced NIR-absorption after switching off the laser light can be fitted by an addition of two exponentials. The temperature dependence of these time constants is not Arrhenius like indicating several interaction mechanisms.
Beschreibung: 
7th Europhysical Conference on Defects in Insulating Materials (Eurodim 94), ECOLE NORMALE SUPIRIEURE LYON, LYON, FRANCE, JUL 05-08, 1994
ISSN: 10420150

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