J. Phys. I France
Volume 3, Numéro 5, May 1993
Page(s) 1245 - 1254
DOI: 10.1051/jp1:1993269
J. Phys. I France 3 (1993) 1245-1254

Static and Dynamic luminescence effects of Cr $^{\rm {3+}}$-Tm $^{\rm {3+}}$ pairs in YAG

V. Lupei1, L. Lou1, G. Boulon1, A. Lupei2 and C. Tiseanu2

1  Laboratoire de Physico-Chimie des MatMaux Luminescents , Universiti Lyon I, Bât. 205, 69622 Villeurbanne Cedex, France
2  Institute of Atomic Physics, 76900 Buchanst, Romania.

(Received 9 November 1992, revised 4 January 1993, accepted 14 January 1993)

Luminescence emission of Tm $^{\rm {3+}}$ in YAG codoped with Cr $^{\rm {3+}}$ under selective (into $^{\rm {2}}$E Cr $^{\rm {3+}}$ levels or $^{\rm {3+}}$F $_{\rm {3}}$Tm $^{\rm {3+}}$ levels) and nonselective (into $^{\rm {4}}$T $_{\rm {2}}$ Cr $^{\rm {3+}}$) excitation is dominated by three new centers. Based on structural and spectral characteristics, these centers are associated with the three possible perturbations produced by Cr3+ ions at the nearest neighbour Tm $^{\rm {3+}}$ ions. A selective energy transfer within these Cr $^{\rm {3+}}$-Tm $^{\rm {3+}}$ pairs is observed.

78.50 - 78.55

© Les Editions de Physique 1993