Non-equilibrium carriers dynamics in Ce-doped YAG, LuAG and GAGG crystals with and without Mg-codoping
| Autor: | Lucchini M, Buganov O, Auffray E, Bohacek P, Korjik M, Kozlov D, Nargelas S, Nikl M, Tikhomirov S, Tamulaitis G, Vaitkevicius A, Kamada K, Yoshikawa A |
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| Přispěvatelé: | Lucchini, M, Buganov, O, Auffray, E, Bohacek, P, Korjik, M, Kozlov, D, Nargelas, S, Nikl, M, Tikhomirov, S, Tamulaitis, G, Vaitkevicius, A, Kamada, K, Yoshikawa, A |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Popis: | Non-linear absorption spectroscopy in pump and probe configuration has been used to test the population of non-equilibrium carriers in Ce-doped Y3Al5O12 (YAG), Lu3Al5O12 (LuAG), and Gd3AlxGa(5-x)O12 (GAGG) crystals with and without codoping by Mg2+ ions. A faster rise time of the induced optical density has been observed in all crystals codoped with Mg with respect to that in Mg-free samples. A significant difference in the time evolution of the differential optical density in GAGG with respect to YAG and LuAG crystals has also been measured. In both GAGG:Ce and GAGG:Ce,Mg an absorption band with maximum in the blue-green range and a decay time of 1.4 ps is present. This band is due to the absorption by free electrons before they are trapped or re-captured by Ce3+ ions. A broad absorption band in the yellow-red region with very short rise time and a decay time longer than 150 ps has been observed in all the Ce-doped garnets under study and can be attributed to the absorption from the Ce3+ excited states. |
| Databáze: | OpenAIRE |
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