| Autor: |
Anastasia Uvarova, Pavel Loiko, Sascha Kalusniak, Elena Dunina, Liudmila Fomicheva, Alexey Kornienko, Stanislav Balabanov, Alain Braud, Patrice Camy, Christian Kränkel |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Optical Materials Express. 13:1385 |
| ISSN: |
2159-3930 |
| DOI: |
10.1364/ome.487909 |
| Popis: |
We report on a detailed revision of the spectroscopic properties of Er3+ ions in the cubic sesquioxide host crystals R2O3 (R = Y, Lu and Sc). The 4f-4f transition probabilities are calculated by applying a modified Judd-Ofelt theory accounting for configuration interaction based on the measured absorption spectra. The stimulated-emission cross-sections for the 4I11/2 → 4I13/2 (at ∼2.8 µm) and 4I13/2 → 4I15/2 (at ∼1.6 µm) transitions of Er3+ ions are determined and the luminescence dynamics from the 4I11/2 and 4I13/2 manifolds are studied at different temperatures. It is found that the luminescence lifetime of the 4I11/2 state strongly depends on the host-forming R3+ cation even at low temperatures due to a non-negligible non-radiative multiphonon decay channel. Er:Y2O3 exhibits the lowest phonon energies and consequently the longest 4I11/2 luminescence lifetimes. A disagreement between the absorption and emission probabilities for the 4I15/2 ↔ 4I11/2 transition of Er3+ ions is observed at room temperature and explained considering the distribution of Er3+ ions over two non-equivalent crystallographic sites, C2 and C3i. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
