Photoluminescence increase of Er3+ in Na2O-Nb2O5-SiO2 glasses after crystallization

Citation
Zd. Yao et al., Photoluminescence increase of Er3+ in Na2O-Nb2O5-SiO2 glasses after crystallization, J NON-CRYST, 259, 1999, pp. 45-50
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN journal
0022-3093 → ACNP
Volume
259
Year of publication
1999
Pages
45 - 50
Database
ISI
SICI code
0022-3093(199911)259:<45:PIOEIN>2.0.ZU;2-5
Abstract
Photoluminescence (PL) of Er3+ doped in xNaO(0.05)-xNbO(2.5)-(100 - 2x)SiO2 (mol%) (x = 24, 27, 30, 33, 36) glasses was investigated before and after crystallization. After crystallization, Er3+ was determined to be in the gl ass phase. Following the precipitation of the NaNbO3 crystalline phase in t hese glasses, PL intensity of S-4(3/2) --> I-4(15/2) transition of Er3+ inc reased. A maximum of >100-fold increment in the PL intensity was observed a fter crystallization as compared with that of the uncrystallized glass. The mechanism of augmentation of the PL intensity is discussed in terms of the theory of PL intensity. We assume that the difference in the refractive in dex between the residual glass and crystallized phases was a dominant facto r causing the increase of the PL intensity after crystallization. (C) 1999 Elsevier Science B.V. All rights reserved.