Spectroscopic investigations of Ho³⁺/Er³⁺:CaYAlO₄ and Eu³⁺/Er³⁺:CaYAlO₄ crystals for 2.7 ¦Ìm emission

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• 作者：Shaozhen Lv ; Zhaojie Zhu ; Yan Wang ; Zhenyu You ; Jianfu Li ; Chaoyang Tu
• 关键词：Mid-infrared emission ; CaYAlO4 crystal ; Spectra characteristics
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：144
• 期：Complete
• 页码：117-121
• 全文大小：1029 K

文摘

Ho³⁺/Er³⁺:CaYAlO₄ and Eu³⁺/Er³⁺:CaYAlO₄ co-doped crystals were grown by Czochralski method. A detailed spectra analysis such as absorption spectra, up-conversion fluorescence, near-infrared and mid-infrared fluorescence spectra as well as luminescence decay curves was measured in order to optimize the deactivator for mid-infrared (2.7 ¦Ìm) emission in Er³⁺: CaYAlO₄ crystal. The influence of different deactivators on the spectra characteristics was studied. The energy transfer mechanisms, the related energy transfer coefficients and the stimulated emission cross-section were determined. Results show Ho³⁺ ion is the more appropriate deactivator than Eu³⁺ ion with which self-termination bottleneck effect was effectively suppressed. All imply that Ho³⁺ co-doping is beneficial for achieving 2.7 ¦Ìm emission in Er³⁺:CaYAlO₄ crystal.