Infrared-excited bright green and red luminescence in La3Ga5.5Ta0.5O14 doped with erbium and ytterbium |
| |
| Authors: | S. GeorgescuO. Toma A.M. VoiculescuC. Matei R. BirjegaL. Petrescu |
| |
| Affiliation: | a National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Jud. Ilfov 077125, Romania
b Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest 76201, Romania |
| |
| Abstract: | Bright green (at 525 and 550 nm) and red (at 660 nm) luminescence in Er:Yb:La3Ga5.5Ta0.5O14 (LGT) powder synthesized by solid state reaction was obtained by pumping at 936 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. |
| |
| Keywords: | Upconversion Luminescence Rare earth Langatate Er3+ Yb3+ |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
