Growth and optical properties of Yb and Tb codoped BaB2O4 crystals |
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| Authors: | VP Solntsev AP YelisseyevTB Bekker AE KokhS Yu Stonoga AV DavydovA Maillard |
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| Institution: | a Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
b Lorrain University, Metz, France |
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| Abstract: | Optical absorption and luminescence spectra of ytterbium and terbium codoped BaB2O4 (β-BBO and α-BBO) crystals grown in different conditions have been studied. Low-temperature absorption peaks were observed in all samples. Features related to rare earth ions were observed in absorption and luminescence spectra. Absorption and emission in the range 860-1000 nm are caused by 2F5/2↔2F7/2 transitions in Yb3+ ions. Emission peaks at 500, 550, 590 and 630 nm correspond to 5D4→7F6, 7F5, 7F4, and 7F3 transitions of Tb3+ ions, respectively. The probable reasons of variations in spectroscopic features related to Yb in BBO host are discussed. It has been shown that the replacement of Ва2+ by Yb3+ in the lattice of ВаВ2О4 results in the decrease in the symmetry of oxygen surrounding of Yb3+. |
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| Keywords: | Yb3+ Tb3+:BaB2O4 crystal Crystal growth Optical properties Optical absorption Luminescence |
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