Standard and modified Judd-Ofelt theories in Pr3+-doped calcium aluminosilicate glasses: a comparative analysis
| Autor: | V. S. Zanuto, Nelson G. C. Astrath, G. A. S. Flizikowski, Luiz Antônio de Oliveira Nunes, Luis C. Malacarne, Mauro Luciano Baesso |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Praseodymium Mechanical Engineering Doping Metals and Alloys Calcium aluminosilicate chemistry.chemical_element Thermodynamics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Branching (polymer chemistry) 01 natural sciences 0104 chemical sciences Root mean square chemistry.chemical_compound chemistry Mechanics of Materials ESTADO SÓLIDO Materials Chemistry Radiative transfer Standard theory 0210 nano-technology |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | 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 0 3 → H 4 3 and D 2 1 → H 4 3 transitions were over 60% for both glass hosts, suggesting its potential use as solid-state laser devices. |
| Databáze: | OpenAIRE |
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