外文题目: Selective doping of Ni2+ in highly transparent glass-ceramics containing nano-spinels ZnGa2O4 and Zn1+xGa2-2xGexO4 for broadband near-infrared fiber amplifiers
作者: Gao, Zhigang; Liu, Yinyao; Ren, Jing; Fang, Zaijin; Lu, Xiaosong; Lewis, Elfed; Farrell, Gerald; Yang, Jun; Wang, Pengfei
刊名: Sci Rep
年: 2017 卷: 7 文章编号：1783
英文关键词:

LONG-PERSISTENT LUMINESCENCE; IN-TUBE METHOD; SILICATE GLASS; ZNAL2O4 NANOCRYSTALS; OXYFLUORIDE GLASS; LOCAL ENVIRONMENT; EMISSION; PHOTOLUMINESCENCE; SPECTROSCOPY; EVOLUTION
英文摘要:
Selective doping of Ni2+ 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 ZnGa2O4: Ni2+ nano-spinels embedded GCs with excellent transparency. A comparison is made of the NIR luminescence properties of Ni2+ doped GCs containing ZnGa2O4, germanium-substituted ZnGa2O4 nano-spinels (Zn1+xGa2-2xGexO4), and Zn2GeO4/Li2Ge4O9 composite nanocrystals that are free of Ga3+. The results show that ZnGa2O4: Ni2+ GCs exhibit a significantly enhanced NIR emission. The incorporation of the nucleating agent TiO2 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.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1038/s41598-017-01676-6


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