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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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摘要

Novel glass-ceramic optical fibers containing NaLuF _(4) nanocrystals doped with 0.5ErF _(3) and 2YbF _(3) (mol%) have been prepared by the rod-in-tube method and controlled crystallization. NaLuF _(4) nanocrystals with a size around 20 nm are obtained after heat treatment at 600 °C. Intense upconverted green and red emissions due to ( ~(2) H _(11/2) , ~(4) S _(3/2) ) → ~(4) I _(15/2) and ~(4) F _(9/2) → ~(4) I _(15/2) transitions, respectively, together with a blue emission due to ~(2) H _(9/2) → ~(4) I _(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 Er ~(3+) 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 Er ~(3+) 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：通过棒管方法制备掺杂有0.5erF _（3）和2YBF _（3）（Mol％）的掺杂0.5erf _（4）纳米晶体的新型玻璃 - 陶瓷光纤。在600℃的热处理后，获得尺寸约为20nm的Naluf _（4）纳米晶。由于（〜（2）H _（11/2），〜（4）S _（3/2））→〜（4）I _（15/2）和〜（4）引起的强烈升级的绿色和红色排放f _（9/2）→〜（4）I _（15/2）转换，同时由于〜（2）H _（9/2）→〜（4）I _（15） / 2）在980nm的激发下观察到过渡。绿色和红色上变频带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，并证明了敏化能量转移上升过程​​负责ER的发光水平的群体〜（3+）离子。通过增加激励功率密度，上变发射颜色从黄色变为绿色，这允许操纵玻璃纤维中的ER〜（3+）发射的颜色输出。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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