Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin, 150001, China.
Key Lab of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai, 201800, China.
Sci Rep. 2017 May 11;7(1):1783. doi: 10.1038/s41598-017-01676-6.
Selective doping of Ni in octahedral sites provided by nanocrystals embedded in glass-ceramics (GCs) is crucial to the enhancement of broadband near-infrared (NIR) emission. In this work, a NIR emission with a full-width-at-half-maximum (FWHM) of 288 nm is first reported from ZnGaO: Ni nano-spinels embedded GCs with excellent transparency. A comparison is made of the NIR luminescence properties of Ni doped GCs containing ZnGaO, germanium-substituted ZnGaO nano-spinels (Zn Ga Ge O), and ZnGeO/LiGeO composite nanocrystals that are free of Ga. The results show that ZnGaO: Ni GCs exhibit a significantly enhanced NIR emission. The incorporation of the nucleating agent TiO is favored in terms of the increased luminescence intensity and prolonged lifetime. The possible causes for the enhancement effect are identified from the crystal structure/defects viewpoint. The newly developed GCs incorporate good reproducibility to allow for a tolerance of thermal treatment temperature and hence hold great potential of fiberization via the recently proposed "melt-in-tube" method. They can be considered as promising candidates for broadband fiber amplifiers.
选择在纳米晶嵌入的微晶玻璃（GCs）的八面体位置掺杂 Ni，对于增强宽带近红外（NIR）发射至关重要。在这项工作中，首次报道了在具有优异透明度的 ZnGaO：Ni 纳米尖晶石嵌入 GCs 中，具有半峰全宽（FWHM）为 288nm 的 NIR 发射。对含有 ZnGaO、锗取代的 ZnGaO 纳米尖晶石（ZnGaGeO）和无 Ga 的 ZnGeO/LiGeO 复合纳米晶的掺杂 GCs 的 NIR 发光性能进行了比较。结果表明，ZnGaO：Ni GCs 表现出显著增强的 NIR 发射。从晶体结构/缺陷的角度来看，有利于加入成核剂 TiO，以提高发光强度和延长寿命。从晶体结构/缺陷的角度确定了增强效应的可能原因。新开发的 GCs 具有良好的重现性，可以耐受热处理温度，因此通过最近提出的“管内熔融”方法具有很大的光纤化潜力。它们可以被认为是宽带光纤放大器的有前途的候选材料。
