Growth of Yb : Na2SO4 crystals and study of their spectral - luminescent characteristics

Ytterbium-doped single crystals of the high-temperature hexagonal sodium sulphate modification are grown by the Czochralski method. It is found by energy dispersive analysis that the crystallisation occurs congruently. The Yb : Na2SO4 crystals have additional (with respect to Yb3+ ions) absorption b...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2019-11, Vol.49 (11), p.1008-1010
Main Authors: Tsvetkov, V.B., Proydakova, V.Yu, Kuznetsov, S.V., Subbotin, K.A., Lis, D.A., Yapryntsev, A.D., Ivanov, V.K., Fedorov, P.P.
Format: Article
Language:English
Subjects:
Absorption spectra
Color centers
crystal growth
Crystallization
Crystals
Czochralski method
heterovalent isomorphism
High temperature
Luminescence
luminescence spectra
Single crystals
Sodium sulfate
sodium sulphate
Time constant
Ytterbium
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Summary:Ytterbium-doped single crystals of the high-temperature hexagonal sodium sulphate modification are grown by the Czochralski method. It is found by energy dispersive analysis that the crystallisation occurs congruently. The Yb : Na2SO4 crystals have additional (with respect to Yb3+ ions) absorption bands in the regions of 650, 850 and 1150 nm, which obviously belong to colour centres. The luminescence spectrum of the Yb : Na2SO4 single crystal noticeably differs from the luminescence spectrum of Yb : YAG crystals by the presence of a broad band without a prominent peak. The luminescence decay curve for the powder is single-exponential with a time constant of 1175 μs, which is somewhat larger than that for the Yb : YAG crystal. The lifetime of the ytterbium excited state does not change during storage of the samples in air for a week.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17107