Upconversion of Er^(3+) Ions in LiKGdF_5:Er^(3+),Dy^(3+) Single Crystal Produced by Infrared and Green Laser

作     者：郭海 尹民 张慰萍 

作者机构：Department of PhysicsZhejiang Normal University Jinhua 321004 ChinaZhejiang Key Laboratory for Reactive Chemistry on Solid SurfacesInstitute of Physical Chemistry Zhejiang Normal University Jinhua 321004China Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026 China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2006年第24卷第6期

页      面：740-744页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：Project supported by a grant from Department of Education of Zhejiang Province (20060496) 

主　　题：upconversion LiKGdF5:Er^3+ excited state absorption energy transfer rare earths 

摘      要：The upconversion fluorescence of Er^3＋ ions in LiKGdF5 ： Er^3＋, Dy^3＋ single crystal was studied under 785, 514.5, and 980 nm laser excitation. With the laser excitation set at 785 nm, strong green （centered at 543 nm） upconversion emissions, as well as weak red （651 nm）, violet （406 nm）, and blue （470 nm） upconversion emissions were obtained. With 514.5 nm laser excitation, violet （406 nm） and blue （470 nm） upconversion emissions were observed. Under 980 nm laser excitation, strong green （543 nm） and weak red （651） emissions were also obtained. The laser power dependence of the upconverted emissions was investigated to understand the upconversion mechanism. The excited state absorption （ESA） and the energy transfer （ET） processes were discussed as the possible mechanisms for all upconversion emissions.