The temperature dependence studies of rare-earth (Dy.sup.3+./sup., Sm.sup.3+./sup., Eu.sup.3+./sup. and Tb.sup.3+./sup.) activated Gd.sub.3./sub.Ga.sub.3./sub.Al.sub.2./sub.O.sub.12./sub. garnet single crystals

0482782 - FZÚ 2018 RIV NL eng J - Článek v odborném periodiku
Bartosiewicz, Karol - Babin, Vladimir - Beitlerová, Alena - Boháček, Pavel - Jurek, Karel - Nikl, Martin
The temperature dependence studies of rare-earth (Dy³⁺, Sm³⁺, Eu³⁺ and Tb³⁺) activated Gd₃Ga₃Al₂O₁₂ garnet single crystals.
Journal of Luminescence. Roč. 189, Sep (2017), s. 126-139. ISSN 0022-2313. E-ISSN 1872-7883
Grant CEP: GA ČR GA16-15569S
GRANT EU: European Commission(XE) 316906 - LUMINET
Institucionální podpora: RVO:68378271
Klíčová slova: Gd3Ga3Al2O12 * rare earth dopants * energy transfer * thermal quenching * single crystal
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.732, rok: 2017

The luminescence properties of the Dy3+, Sm3+, Eu3+ and Tb3+ activated Gd3Ga3Al2O12 (GGAG) single crystals were investigated as a function of temperature. The photoluminescence excitation, emission and decay kinetic analysis revealed an efficient energy transfer from Gd3+ ions towards all the Dy3+, Sm3+, Eu3+ and Tb3+ activators. The intensity ratio between electric dipole and magnetic dipole emission transitions in activator׳s ions suggested a high homogeneity of the host lattice grown by Czochralski technique. Only the Gd3Ga3Al2O12 single crystal activated with Dy3+ ions exhibited a stable luminescence up to 800 K. The Sm3+, Eu3+ and Tb3+ doped Gd3Ga3Al2O12 single crystals showed the onset of the thermal quenching of luminescence at lower temperatures. We proposed three different models, very well-known from the literature, to explain the mechanisms responsible for thermal quenching of activator׳s luminescence in Gd3Ga3Al2O12 single crystal.

Trvalý link: http://hdl.handle.net/11104/0278161