【摘要】 采用提拉法成功合成了五种晶体：Dy∶Ca₃Li_0.275Nb_1.775Ga_2.95O₁₂（CLNGG）、Dy,Tb∶CLNGG、Dy,Eu∶CLNGG、Tb∶CLNGG和Eu∶CLNGG。通过分析它们在室温下的吸收光谱、激发与发射光谱以及荧光衰减曲线，对其光谱特性及能量传递机制进行了详细研究。基于Judd-Ofelt理论计算进一步阐明了这些特性。结果表明，在Dy³⁺体系中，与Tb³⁺和Eu³⁺离子共掺杂不仅增强了黄光波长区域的发射截面，并且提高了荧光量子效率。这些改进对于实现Dy³⁺的高效黄光输出尤为有利。此外，相关研究证实了在Dy,Tb∶CLNGG晶体中，Dy³⁺与Tb³⁺离子之间存在相互的能量传递现象，而在Dy,Eu∶CLNGG晶体中，则是Dy³⁺与Eu³⁺发生单向的能量传递。基于所获得的研究结果，Dy,Tb∶CLNGG和Dy,Eu∶CLNGG晶体是二极管泵浦全固态黄光激光器中极具竞争力且具备应用潜力的激光介质。更多还原

【Abstract】 In this work,five kinds of crystals were successfully synthesized using the Czochralski method for the first time,namely Dy∶Ca₃Li_0.275Nb_1.775Ga_2.95O₁₂ （CLNGG）,Dy,Tb∶CLNGG,Dy,Eu∶CLNGG,Tb∶CLNGG,and Eu∶CLNGG.A detailed investigation of spectral features and energy transfer mechanisms in such crystals was conducted by analyzing their optical absorption spectra,excitation and emission spectra,and fluorescence decay curves at ambient temperature.Calculations based on the Judd-Ofelt theory further elucidated these features.The results demonstrate that in the Dy³⁺ system,co-doping with Tb³⁺ and Eu³⁺ ions not only enhances the emission cross-sections in the yellow wavelength region but also improves the fluorescence quantum efficiency.These improvements are particularly beneficial for achieving efficient yellow light output from Dy³⁺.Additionally,the studies confirm the occurrence of reciprocal energy transfer between Dy³⁺ and Tb³⁺ ions in Dy,Tb∶CLNGG crystals,whereas unidirectional energy transfer from Dy³⁺ to Eu³⁺ occurs in Dy,Eu∶CLNGG crystals.Based on the obtained research results,Dy,Tb∶CLNGG and Dy,Eu∶CLNGG crystals could be utilized as compelling and potential laser media for diode-pumped all-solid-state yellow lasers.更多还原