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Regular version of the site

Article

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

Quantum Electronics. 2019. Vol. 49. No. 11. P. 1008-1010.
Tsvetkov V. B., Proydakova V. Y., Kuznetsov S. V., Subbotin K. A., Lis D. A., Yapryntsev A. D., Ivanov V. K., Fedorov P. P.

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 crystallization occurs congruently. The Yb :Na2SO4 crystals have additional (with respect to Yb 3+ 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 ms, 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.