Judd-Ofelt modelling and stimulated-emission cross-sections for Tb3+ ions in monoclinic KYb(WO4)2 crystal
| Autor: | Mateos, X., Loiko, P., Dunina, E., Kornienko, A., Volokitina, A., Vilejshikova, E., Serres, J. M., Baranov, A., Yumashev, K., Aguiló, M., Díaz, F. |
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| Přispěvatelé: | Física i Cristal·lografia de Nanomaterials, Física i Cristal.lografia de Materials, Química Física i Inorgànica, Universitat Rovira i Virgili |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Journal of Luminescence Repositori Institucional de la Universitat Rovira i Virgili Universitat Rovira i virgili (URV) |
| DOI: | 10.1016/j.jlumin.2017.05.031 |
| Popis: | Absorption and emission properties of Er3+ ions in a cubic elpasolite crystal, Cs2NaYF6, are modeled within the Judd-Ofelt (J-O) theory. The J-O intensity parameters have been determined: ¿2 = 0.665, ¿4 = 0.217 and ¿6 = 0.029 ¿10-20 cm2. The elpasolite structure of Cs2NaYF6 containing isolated [YF6] polyhedra allows high Er3+ doping levels up to 100 at.% without considerable concentration quenching of luminescence and exceptionally long lifetimes of the excited states (in particular, the radiative lifetimes of the 4I13/2 and 4I11/2 states are as long as 36.7 ms and 113.4 ms, respectively). It also shows weak non-radiative relaxation. Stimulated-emission cross-sections have been determined for the Er3+ transitions in Cs2NaYF6 at ~2.7 and ~1.5 ¿m as well as in the visible spectral range. |
| Databáze: | OpenAIRE |
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