REDISTRIBUTION OF CR3- THE MGO EFFECT( DEFECT CENTERS IN LINBO3 CRYSTALS )

Authors
DIAZCARO J GARCIASOLE J MARTINEZ JL HENDERSON B JAQUE F HAN TPJ
Citation
J. Diazcaro et al., REDISTRIBUTION OF CR3- THE MGO EFFECT( DEFECT CENTERS IN LINBO3 CRYSTALS ), Optical materials, 10(1), 1998, pp. 69-77
Citations number
12
Categorie Soggetti
Material Science",Optics
Journal title
Optical materials → ACNP
ISSN journal
09253467
Volume
10
Issue
1
Year of publication
1998
Pages
69 - 77
Database
ISI
SICI code
0925-3467(1998)10:1<69:ROCTME>2.0.ZU;2-V
Abstract
A broad emission band centred at 1000 nm is reported in codoped LiNbO3 :Cr:MgO crystals. The intensity of this emission band increases with i ncreasing MgO concentration at dopant levels higher than 4%. This emis sion band is attributed to Cr3+ ions substituting into Nb5+ sites. For MgO concentration levels above 4% a transfer of Cr3+ ions located in Li+ sites to Nb5+ sites is observed. This redistribution of the Cr3+ i ons is discussed in terms of the occupation of Li+ vacancies and antis ites by Mg2+ ions. Time resolved excitation spectra and fluorescence l ifetime decays of the two kind of Cr3+ ions are reported. (C) 1998 Els evier Science B.V.