Abstract
We have studied optical characteristics of Er3+-, Ho3+-, and Yb3+-doped ZBLAN and TWL glasses. Their luminescence was excited at wavelengths of 975, 378, and 449 nm. The 975-nm radiation excited the Yb3+ (2 F 7/2 → 2 F 5/2), and the excitation energy was then transferred to the Er3+ and Ho3+. The short-wavelength excitation led to cross-relaxation processes: (4 F 7/2, 2 F 7/2) → (4 I 11/2, 2 F 5/2) for the Er3+-Yb3+ pair (378 nm) and (5 F 3, 2 F 7/2) → (5 I 5, 2 F 5/2) for the Ho3+-Yb3+ (449 nm). At the three excitation wavelengths, we observed green luminescence in the range 525–550 nm. Using the glasses studied here, we prepared thin colorless lacquer films potentially attractive for hidden information recording and hidden labeling of various objects and materials.
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Original Russian Text © A.P. Savikin, A.V. Budruev, A.N. Shushunov, E.L. Tikhonova, K.V. Shastin, I.A. Grishin, 2014, published in Neorganicheskie Materialy, 2014, Vol. 50, No. 11, pp. 1261–1265.
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Savikin, A.P., Budruev, A.V., Shushunov, A.N. et al. Fluoride and tellurite glasses for thin-film IR viewers. Inorg Mater 50, 1169–1173 (2014). https://doi.org/10.1134/S0020168514110156
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DOI: https://doi.org/10.1134/S0020168514110156