Effect of temperature on optical spectra and relaxation dynamics of Sm3+ in Gd3Ga5O12 single crystals
PBN-AR
Instytucja
Instytut Fizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN
0925-8388
EISSN
Wydawca
ELSEVIER SCIENCE SA
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
208-212
Numer tomu
582
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
FIELD LUMINESCENCE GARNETS GROWTH ND
Streszczenia
Język
en
Treść
Single crystals of Gd3Ga5O12 (GGG) doped with 2 at.% and 10 at.% of Sm3+ were fabricated by the Czochralski method. Optical absorption and emission spectra as well as luminescence decay curves for these crystals were recorded at different temperatures ranging from 5 K to 300 K. The energies of the crystal field sublevels of selected multiplets were determined based on optical spectra recorded at T = 5 K. It has been found that widths of spectral lines related to transitions between individual crystal field levels of multiplets involved increase by factors of 5-7 when the sample temperature grows from 5 K to 300 K. In contrast to this the positions of spectral lines appear to be independent of temperature. Temperature dependence of the (4)G(5/2) luminescence lifetime was determined for both concentrations of samarium. Luminescence decay curves follow a single-exponential time dependence when Sm3+ concentration amounts to 2 at.% but a non-exponential decay kinetic and efficient quenching process were observed in highly-doped sample. The Inokuti-Hirayama classical energy transfer model was utilized successfully to account for time dependence of an experimental decay curves recorded for GGG: 10 at.% Sm crystal. (C) 2013 Elsevier B.V. All rights reserved.
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Original article
Original article presents the results of original research or experiment.
Inne
System-identifier
PBN-R:674489
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