正交晶系
倍半氧化物
材料科学
兴奋剂
激光器
晶体结构
Crystal(编程语言)
分析化学(期刊)
结晶学
光电子学
化学
光学
物理
程序设计语言
计算机科学
色谱法
冶金
作者
Ruiqi Guo,Fangyan Wang,Shuxian Wang,Kui Wu,Dazhi Lu,Fei Liang,Haohai Yu,Huaijin Zhang
标识
DOI:10.1021/acs.cgd.3c00143
摘要
Yb3+-doped rare-earth sesquioxide crystals are a class of promising laser materials due to their high host thermal conductivity, but the insufficient emission bandwidth limits their applications in ultrafast pulsed lasers. Yb3+-doped orthorhombic mixed rare-earth sesquioxides show an effective spectral broadening based on the solid solution mixing strategy and indicate the development potential in ultrafast lasers. Herein, high-quality orthorhombic Yb:GdScO3 and Yb:LaLuO3 crystals were grown by optimizing the composition of raw oxide materials. Unlike the nearly standard stoichiometric cationic ratio in Yb:GdScO3, Yb:LaLuO3 shows a La/Lu ratio below 1, suggesting the presence of anti-site LuLa defects in the host lattice. The following spectral analysis and crystal-field calculation indicate that Yb:GdScO3 has only one kind of luminescent Yb3+ site, while Yb:LaLuO3 has four types of Yb3+ centers due to the anti-site effect. Furthermore, as for the same species of Yb3+-doped sites, Yb:LaLuO3 demonstrates nearly two times of inhomogeneous spectral broadening as that of Yb:GdScO3, which renders a more promising application value in ultrafast lasers. This study elucidates the importance of understanding the structure–activity relationship between different Yb3+-doped orthorhombic sesquioxides and might provide a feasible route for exploring Yb3+-doped ultrafast laser gain materials.
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