Yb:Ta:RbTiOPO4, A New Strategy to Further Increase the Lanthanide Concentration in Crystals of the KTiOPO4 Family

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• 作者：A. Peñ ; a ; J. J. Carvajal ; J. Massons ; Jna. Gavaldà ; F. Dí ; az ; M. Aguiló
• 刊名：Chemistry of Materials
• 出版年：2007
• 出版时间：August 7, 2007
• 年：2007
• 卷：19
• 期：16
• 页码：4069 - 4076
• 全文大小：208K
• 年卷期：v.19,no.16(August 7, 2007)
• ISSN：1520-5002

文摘

In this study, we determined the variation of the crystallization region of rubidium titanyl phosphatecodoped with tantalum and yterbium at three different molar ratios of Rb₂O, P₂O₅, and TiO₂ in thisternary system. The amount of Yb³⁺ and Ta⁵⁺ that can substitute for Ti⁴⁺ without losing the desiredphase strongly depends on the amount of TiO₂ in the initial solution. The critical amount of Yb³⁺ increasesas the initial solution is richer in TiO₂. Yb:Ta:RbTiOPO₄ single crystals have been grown with dimensionsand quality enough to perform their optic and spectroscopic characterization. The optical transparencywindow has been measured for RbTi_0.96Ta_0.04OPO₄ and RbTi_0.95Ta_0.03Yb_0.02OPO₄ crystals. Opticalabsorption and fluorescence of Yb³⁺ in RbTi_0.95Ta_0.03Yb_0.02OPO₄ have been recorded at room and lowtemperatures.