A. M. Zubareva, A. A. Shakirov, T. M. Minnebaev, E. I. Oleinikova, A. G. Nikolaev, A. G. Kiiamov, A. S. Nizamutdinov
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Anti-Stokes Luminescence in BaY2F8 Crystals with Coactivation by Tb3+ and Yb3+ Ions
Spectral-kinetic characteristics of BaY2F8:Tb3+–Yb3+ in anti-Stokes luminescence processes with excitation at a wavelength of 980 nm were studied. Luminescence occurs up to UV range at transitions 5D3 → 7Fj (j = 4, 5, 6) due to energy transfer processes from ytterbium ions to terbium ions and multiphoton excitation. The power index of the dependence of the luminescence intensity on the power of the pulse excitation was measured, which is equal to 2.27 and 2 for the 5D4 and 5D3 levels, respectively. The quantum yield of anti-Stokes luminescence of crystals with coactivation by Tb3+–Yb3+ ions was measured, which is equal to 0.004, 0.03 and 0.014% for, respectively, 2, 5 and 10 at % concentration of ytterbium ions.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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