Standard and modified Judd-Ofelt theories in Pr3+-doped calcium aluminosilicate glasses: a comparative analysis.
FLIZIKOWSKI, G. A. S.; ZANUTO, V. S.; NUNES, Luiz Antônio de Oliveira; BAESSO, M. L.; MALACARNE, L. C.; ASTRATH, N. G. C.
FLIZIKOWSKI, G. A. S.; ZANUTO, V. S.; NUNES, Luiz Antônio de Oliveira; BAESSO, M. L.; MALACARNE, L. C.; ASTRATH, N. G. C.
 Abstract: 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 3P0 -> 3H4 and 1D2 -> 3H4 and transitions were over 60% for both glass hosts, suggesting its potential use as solid-state laser devices. | |
| Journal of Alloys and Compounds |
| v. 780, p. 705-710 - Ano: 2019 |
| Fator de Impacto: 3,779 |
| http://dx.doi.org/10.1016/j.jallcom.2018.11.308 |  @article={002916831,author = {FLIZIKOWSKI, G. A. S.; ZANUTO, V. S.; NUNES, Luiz Antônio de Oliveira; BAESSO, M. L.; MALACARNE, L. C.; ASTRATH, N. G. C.},title={Standard and modified Judd-Ofelt theories in Pr3+-doped calcium aluminosilicate glasses: a comparative analysis},journal={Journal of Alloys and Compounds},note={v. 780, p. 705-710},year={2019}} |