Abstract
The up-conversion luminescence of Er3+ from the 2 H 11/2, 4 S 3/2, and 4 F 9/2 levels in nanocrystals of Y0.95(1‒x)Yb0.95x Er0.05PO4 (x = 0, 0.3, 0.5, 0.7, 1) orthophosphates activated with Er3+ ions has been studied under the excitation of Yb3+ ions to the 2 F 5/2 level by 972-nm cw laser radiation. Broadband radiation in the wavelength range of 370–900 nm has been observed at certain power densities of exciting laser radiation; this broadband radiation is absent in the case of excitation of the powders under study by pulsed laser radiation with a wavelength of 972 nm at a pulse repetition frequency of 10 Hz and a duration of a pulse of 15 ns. Experimental data indicating that this radiation is thermal in nature have been presented.
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Original Russian Text © S.A. Khrushchalina, P.A. Ryabochkina, V.M. Kyashkin, A.S. Vanetsev, O.M. Gaitko, N.Yu. Tabachkova, 2016, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2016, Vol. 103, No. 5, pp. 342–349.
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Khrushchalina, S.A., Ryabochkina, P.A., Kyashkin, V.M. et al. Broadband white radiation in Yb3+- and Er3+-doped nanocrystalline powders of yttrium orthophosphates irradiated by 972-nm laser radiation. Jetp Lett. 103, 302–308 (2016). https://doi.org/10.1134/S0021364016050064
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DOI: https://doi.org/10.1134/S0021364016050064