Visible quantum cutting through downconversion in Eu3+-doped KGd3F10 and KGd2F7 crystals

被引：64

作者：

Kodama, N ^{[1
]}

Watanabe, Y ^{[1
]}

机构：

[1] Akita Univ, Fac Engn & Resource Sci, Dept Mat Sci & Engn, Akita 0108502, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 21期

关键词：

D O I：

10.1063/1.1713038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页码：4141 / 4143

页数：3