Optical properties of Dy ions in sodium gadolinium tungstates crystal |
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| Authors: | Hongyan Wang Jianfu Li Zhenyu You Yanping Wei Yan Wang Xiuai Lu Chaoyang Tu |
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| Institution: | a Fujian Institute of Research on the Structure of Matter, State Key Laboratory of Structural Chemistry, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P R China
b Graduated School of Chinese Academy of Sciences, 100039 Beijing, P R China |
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| Abstract: | Dy3+-doped NaGd(WO4)2 crystal with sizes of about Φ20×40 mm2 was grown by the Czochralski technique along the (0 0 1) orientation. Polarized absorption spectra, fluorescence spectra, and fluorescence decay curve of Dy3+-doped NaGd(WO4)2 have been recorded at room temperature. Based on the Judd-Ofelt (J-O) theory, the intensity parameters from the measured line strengths were evaluated. The J-O parameters were used to predict radiative transition probabilities, radiative lifetimes and branching ratios for various excited levels of Dy3+-doped NaGd(WO4)2 crystal. The luminescent quantum efficiency of the 4F9/2 level was determined to be approximately 63% for this material. The emission cross-section of the 4F9/2→6H13/2 transition was estimated by using the Füchtbauer-Ladengurg method. |
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| Keywords: | Dy3+: NaGd(WO4)2 crystal Optical properties Crystal growth |
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