| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10714287 | Physica B: Condensed Matter | 2012 | 4 Pages |
Abstract
Bright green (at 525 and 550Â nm) and red (at 660Â nm) luminescence in Er:Yb:La3Ga5.5Ta0.5O14 (LGT) powder synthesized by solid state reaction was obtained by pumping at 936Â nm. Yb3+-Er3+ energy transfer processes accounting for population of the 2H211/2, 4S3/2 and 4F9/2 Er3+ levels are discussed. The dependence of ratio between the intensities of the green and red luminescence on pump intensity is analyzed. The rather high quantum efficiency (58%) of the (4S3/2, 2H211/2) Er3+ emitting level recommends LGT doped with erbium and ytterbium for upconversion applications.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
S. Georgescu, O. Toma, A.M. Voiculescu, C. Matei, R. Birjega, L. Petrescu,