Visible quantum cutting through downconversion in Eu3+-doped KGd3F10 and KGd2F7 crystals
Visible quantum cutting through downconversion in Eu3+-doped KGd3F10 and KGd2F7 crystals
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DOI：
10.1063/1.1713038
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发表时间：
2004-05-24
影响因子：
4
通讯作者：
Watanabe, Y
中科院分区：
文献类型：
--
作者：
Kodama, N;Watanabe, Y
在掺Eu3+的KGd3F10(KG3F)和KGd2F7(KG2F)中观察到Gd3+-Eu3+对通过下转换产生可见的量子切割(可见双光子发光)。讨论了可见量子切割所需的交叉弛豫效率与Eu3+掺杂浓度和晶体结构的关系，以及能量转移几率与稀土原子间距离的函数关系。与掺Eu3+的KG2F相比，掺Eu3+的KG3F具有更高的交叉驰豫效率。掺2 At的KG3F晶体的交叉驰豫效率最高，为0.65。%EU3+。从KG3F中Eu3+的D-5(0)发射寿命与Eu3+浓度的关系也表明，当Eu3+浓度大于2at时，稀土离子之间的相互作用强烈。%EU3+。(C)2004年美国物理研究所。
Visible quantum cutting (visible two-photon luminescence) through downconversion is observed for the Gd3+-Eu3+ couple in Eu3+-doped KGd3F10 (KG3F) and KGd2F7 (KG2F). The dependence of the efficiency of cross-relaxation required for visible quantum cutting on the Eu3+-doping concentration and crystal structure is discussed in terms of the probability of energy transfer as a function of the rare-earth interatomic distance. Eu3+-doped KG3F exhibits a higher efficiency in the cross-relaxation step than Eu3+-doped KG2F. The highest efficiency of the cross-relaxation step, 0.65, is obtained for the KG3F crystal doped with 2 at. % Eu3+. It is also suggested from dependence of the lifetime of D-5(0) emission of Eu3+ in KG3F on Eu3+ concentration that interactions between rare-earth ions are strong at greater than 2 at. % Eu3+. (C) 2004 American Institute of Physics.