Energy transfer between Er3+ and Tm3+ ions in a barium fluoride-thorium fluoride glass.
Energy transfer between Er3+ and Tm3+ ions in a barium fluoride-thorium fluoride glass.
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DOI：
10.1103/physrevb.39.80
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
Yeh;Petrin;Sibley;Madigou;Adam;Suscavage
中科院分区：
文献类型：
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作者：
Yeh;Petrin;Sibley;Madigou;Adam;Suscavage
研究了掺Yb3+和不掺Yb3+的BaF2-THF4氟化物玻璃中Er3+和Tm3+离子在较宽的温度范围和不同的掺杂浓度下，红外辐射上转换为绿色、红色和805 nm荧光的过程。研究发现，Tm~(3+)的加入优先猝灭了Er~(3+)的S 3/24能级跃迁对应的绿色发射的上转换效率。在300K时，当TmF3浓度为0.5mol%时，发光强度降低约50倍。从Er3+和Tm3+离子之间的能量转移角度讨论了猝灭效应。速率方程模型和贾德-奥菲尔分析结合适当的光学数据导致了对上转换过程的理解。给出了激发态Er~(3+)和Tm~(3+)离子的能量转移速率和低激发态电子布居的绝对值。这些信息应该使研究人员能够量身定做材料，以提高上转换和激光设备的效率。
The up-conversion of infrared radiation into green, red, and 805-nm fluorescence has been studied for Er 3+ and Tm 3+ ions in both Yb 3+-doped and non-Yb 3+-doped BaF 2-ThF 4 fluoride glass over a wide temperature range and several dopant concentrations. It has been found that the addition of Tm 3+ preferentially quenches the up-conversion efficiency of the green emission corresponding to a transition from the S 3/2 4 level of Er 3+. The decrease in emission amounts to a factor of about 50 for a concentration of 0.5 mol% TmF 3 at 300 K. The quenching effect is discussed in terms of energy transfer between Er 3+ and Tm 3+ ions. A rate equation model and a Judd-Ofelt analysis used in conjunction with the appropriate optical data lead to an understanding of the up-conversion process. The absolute values of the energy transfer rates and the electron populations in the lower excited states of the excited Er 3+ and Tm 3+ ions can be determined. This information should enable researchers to tailor materials to improve the efficiency of the up-conversion and laser devices.