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10 June 2013 Upconversion luminescence in La3Ga5.5Ta0.5O14 codoped with Er3+ and Yb3+
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Proceedings Volume 8882, ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III; 888204 (2013) https://doi.org/10.1117/12.2032265
Event: ROMOPTO International Conference on Micro- to Nano-Photonics III, 2012, Bucharest, Romania
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.
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S. Georgescu, A.M. Voiculescu, C. Matei, A. G. Stefan, and O. Toma "Upconversion luminescence in La3Ga5.5Ta0.5O14 codoped with Er3+ and Yb3+", Proc. SPIE 8882, ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III, 888204 (10 June 2013); https://doi.org/10.1117/12.2032265
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