RT Journal Article
T1 Spectroscopy and Judd-Ofelt analysis of Er3+ ions in Li5La3Nb2O12 garnet-type ceramic powder
A1 Egaña Gullón, Álvaro María de
A1 Tardío López, Miguel Modesto
A1 Torre Gamarra, Carmen de la
A1 Varez, Alejandro
A1 Cantelar, Eugenio
A1 Muñoz Santiuste, Juan Enrique
AB The optical spectroscopy of Er3+ activated Lanthanum Lithium Niobium Garnet ceramic powder is presented. The absorption and photoluminescence spectra have been both obtained at room temperature. Emission bands related to transitions starting at I-4(13/2), I-4(11/2), F-4(9/2), (S-4(3/2), H-2(2)(11/2)) and H-2(2)(9/2) manifolds are presented. Efficient excitation of the luminescence bands is obtained under ultraviolet excitation (270 nm) using a Mercury Xenon arc lamp. The Judd-Ofelt intensity parameters of Er3+ in this garnet are calculated using the absorption spectra. The obtained results Omega(2) = 7.67 x 10(20) cm(2); Omega(4) = 0.84 x 10(20) cm(2); Omega(6) = 0.60 x 10(20) cm(2) are used to calculate the radiative lifetimes of the Er3+ luminescence originated up to (4)G(11/2) manifolds and the branching ratios of the radiative transitions on them. The luminescence decays from the main emission lines (H-2(2)(11/2):S-4(3/2)), I-4(11/2), and I-4(13/2) excited levels to the I-4(15/2) ground state of Er3+ have also been obtained. Experimental decay time values are compared with the radiative lifetime values obtained from the Judd-Ofelt analysis.
PB Elsevier
SN 0022-2313
YR 2018
FD 2018-10-01
LK https://hdl.handle.net/10016/39303
UL https://hdl.handle.net/10016/39303
LA eng
NO This work is partially supported by the Spanish MINECO Projects MAT2013-46649-C4-4-P and MAT2015-71070-REDC, and by the EU-FEDER Funds.
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RD 19 may. 2024