Standard and modified Judd-Ofelt theories in Pr3+-doped calcium aluminosilicate glasses: A comparative analysis

Autor(es)

Flizikowski, G. A. S. ^[1] ; Zanuto, V. S. ^{[1, 2]} ; Nunes, L. A. O. ^[2] ; Baesso, M. L. ^[1] ; Malacarne, L. C. ^[1] ; Astrath, N. G. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana - Brazil

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 780, p. 705-710, APR 5 2019.
• Citações Web of Science: 1

Resumo

The small energy difference between the fundamental level and the first opposite parity configuration of Pr3+-doped hosts is particularly challenging for the characterization of radiative transitions using the Judd-Ofelt theory, although modified versions of the theory have been proposed in the past for the investigation of praseodymium doped materials. Here, we present a detailed spectroscopic investigation on two sets of calcium aluminosilicate glasses, with 34 wt% of SiO2(CAS) and with 7 wt% of SiO2(LSCAS), doped with different concentrations of Pr3+(0.5, 1.0 and 2.0 wt%). We use the standard Judd-Ofelt theory to characterize the glasses and the results and derived spectroscopic quantities - such as transition probabilities, radiative lifetimes and branching ratios - are compared to results obtained by the modified Judd-Ofelt theories. The analysis showed that the modified theories could lead to smaller values of root mean square deviations. However, a better agreement between experimental data and the standard theory was achieved when the derived spectroscopic quantities are taken into account. Moreover, the branching ratios of the P-3(0) -> H-3(4) and D-1(2) -> H-3(4) transitions were over 60% for both glass hosts, suggesting its potential use as solid-state laser devices. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 17/16392-6 - Espectroscopia Não-linear em Sólidos Dopados com íons Terras Raras
• Beneficiário: Vitor Santaella Zanuto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado