Spectroscopic properties and mechanisms of excited state absorption and energy transfer upconversion for Er3+-doped glasses
Spectroscopic properties and mechanisms of excited state absorption and energy transfer upconversion for Er3+-doped glasses
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DOI：
10.1016/0022-3093(93)90742-g
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发表时间：
1993-09
影响因子：
3.5
通讯作者：
X. Zou;T. Izumitani
中科院分区：
文献类型：
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作者：
X. Zou;T. Izumitani
研究了掺铒铝酸盐、没食子酸盐和其他几种玻璃在4 I 9 2能级红外下0.55和0.66 μm附近的上转换荧光和0.98和2.72 μm附近的Stokes荧光。结果表明，除4i132能级外，在给定能级上发射的量子效率随玻璃载体声子能量的减小而增大。由于受到来自4 i13 - 2能级的能量传递上转换和激发态吸收的影响，来自4 i13 - 2能级的荧光及其量子效率不依赖于玻璃宿主的声子能量。这种荧光与4i12寿命密切相关，其中在4i12寿命较短的玻璃中可以观察到更强的荧光。来源于4s32能级的绿色上转换荧光主要来源于4i13 - 2能级的激发态吸收，来源于4i9 - 2能级的红色上转换荧光主要来源于er3 +掺杂铝酸盐和没食子酸盐玻璃通过4i13 - 2能级的能量转移上转换。
The upconversion fluorescences near 0.55 and 0.66 μm and Stokes fluorescences near 0.98 and 2.72 μm were measured for Er 3+-doped aluminate, gallate and several other glasses under infrared ation into the 4 I 9 2 level. It was found that the quantum efficiencies of emissions from a given level, except the 4 I 13 2 level, increased in the order of decreasing phonon energies of the glass hosts. The fluorescence originating from the 4 I 13 2 level and its quantum efficiency are not dependent upon the phonon energies of glass hosts, due to influences of the energy transfer upconversion and excited state absorption from the 4 I 13 2 level. Moreover this fluorescence is closely related to the 4 I 11 2 lifetimes, in which the stronger fluorescence can be observed in a glass which has a shorter 4 I 11 2 lifetime. The green upconversion fluorescence originating from the 4 S 3 2 level mainly results from the excited state absorption from the 4 I 13 2 level and the red upconversion fluorescence coming from the 4 I 9 2 level mainly generates from the energy transfer upconversion through the 4 I 13 2 level for Er 3+-doped aluminate and gallate glasses.