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首页> 外文期刊>RSC Advances >Tunable upconversion emission in NaLuF4-glass-ceramic fibers doped with Er3+ and Yb3+
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Tunable upconversion emission in NaLuF4-glass-ceramic fibers doped with Er3+ and Yb3+

机译：NALUF4-玻璃纤维中的可调谐升级发射掺杂有ER3 +和YB3 +

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Novel glass-ceramic optical fibers containing NaLuF4 nanocrystals doped with 0.5ErF(3) and 2YbF(3) (mol%) have been prepared by the rod-in-tube method and controlled crystallization. NaLuF4 nanocrystals with a size around 20 nm are obtained after heat treatment at 600 degrees C. Intense upconverted green and red emissions due to (H-2(11/2), S-4(3/2)) -> I-4(15/2) and F-4(9/2) -> I-4(15/2) transitions, respectively, together with a blue emission due to H-2(9/2) -> I-4(15/2) transition have been observed under excitation at 980 nm. The intensity of the green and red upconversion bands shows a nearly linear dependence on the excitation power which can be explained by saturation effects in the intermediate energy states and proves that a sensitized energy transfer upconversion process is responsible for the population of the emitting levels of Er3+ ions. The upconversion emission color changes from yellow to green by increasing the excitation power density which allows to manipulate the color output of the Er3+ emission in the glass-ceramic fibers. The tunable emission color is easily detected with the naked eye. This interesting characteristic makes these glass-ceramic fibers promising materials for photonic applications.
机译：通过棒管方法制备含有0.5（3）和2毫（3）（3）（Mol％）的NALUF4纳米晶体的新型玻璃 - 陶瓷光纤。在600摄氏度的热处理后获得尺寸约为20nm的Naluf4纳米晶体。（H-2（11/2），S-4（3/2）） - > I-4导致的强烈升高的绿色和红色排放（15/2）和F-4（9/2） - > I-4（15/2）过渡，同时由于H-2（9/2） - > I-4（15 / 2）在980nm的激发下观察到过渡。绿色和红色上变频的强度显示了对激励功率的几乎线性依赖，这可以通过中间能量状态的饱和效应来解释，并证明敏化能量转移上升过程​​负责ER3 +的发光水平的群体负责离子。通过增加允许操纵玻璃陶瓷纤维中的ER3 +发射的颜色输出来从黄色到绿色变为绿色到绿色的变化。用肉眼易于检测可调谐发光颜色。这种有趣的特性使得这些玻璃纤维的光子应用材料有希望的材料。

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    《RSC Advances》 |2019年第54期|共9页
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  • 正文语种 eng
  • 中图分类 化学;
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