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Proceedings Paper

Upconversion luminescence in La3Ga5.5Ta0.5O14 codoped with Er3+ and Yb3+
Author(s): S. Georgescu; A.M. Voiculescu; C. Matei; A. G. Stefan; O. Toma
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Paper Abstract

Green (525, 550 nm, Er3+ transition (2H11/2, 4S3/2) → 4I15/2), red (660 nm, 4F9/24I15/2), blue (440 – 490 nm, 4F3/2,5/2,7/24I15/2), violet (410 nm, 2H9/24I15/2), and near ultraviolet (380 nm, 4G11/24I15/2) upconversion luminescence in langatate (La3Ga5.5Ta0.5O14) doped with erbium and ytterbium ceramic sample, synthesized by solid state reaction in air, was obtained by pumping at 973 nm. Yb3+ – Er3+ energy transfer processes accounting for population of the emitting levels are discussed. The measured lifetimes of the emitting and intermediate Er3+ levels are compared with the radiative lifetimes estimated with the Judd-Ofelt theory.

Paper Details

Date Published: 10 June 2013
PDF: 8 pages
Proc. SPIE 8882, ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III, 888204 (10 June 2013); doi: 10.1117/12.2032265
Show Author Affiliations
S. Georgescu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
A.M. Voiculescu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
C. Matei, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Univ. of Bucharest (Romania)
A. G. Stefan, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Univ. of Bucharest (Romania)
O. Toma, National Institute for Lasers, Plasma and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 8882:
ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III
Valentin I. Vlad, Editor(s)

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