Measurement of non-equilibrium carriers dynamics in Ce-doped YAG, LuAG and GAGG crystals with and without Mg-codoping

0492159 - FZÚ 2019 RIV NL eng J - Journal Article
Lucchini, M.T. - Buganov, O. - Auffray, E. - Boháček, Pavel - Korjik, M. - Kozlov, D. - Nargelas, S. - Nikl, Martin - Tikhomirov, S. - Tamulaitis, G. - Vaitkevicius, A. - Kamada, K. - Yoshikawa, A.
Measurement of non-equilibrium carriers dynamics in Ce-doped YAG, LuAG and GAGG crystals with and without Mg-codoping.
Journal of Luminescence. Roč. 194, Feb (2018), s. 1-7. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA ČR GA16-15569S
EU Projects: European Commission(XE) 644260 - INTELUM; European Commission(XE) 690599 - ASCIMAT
Institutional support: RVO:68378271
Keywords : scintillators * multi-component garnet crystals * non-linear absorption spectroscopy * excitation transfer
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.961, year: 2018

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.
Permanent Link: http://hdl.handle.net/11104/0285717