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Upconversion Luminescence in Nd3+: LaCl3
Yin Min,Krupa J. C.
Author NameAffiliation
Yin Min Department ofPhysics, University of Science and Technology of China, Hefei 230026) 
Krupa J. C. Institute ofNuclear Physics, 91406Orsay Cedex, France 
Abstract:
Blue and near violet upconversion luminescence originating from4D3/2and2G9/2levels in Nd3+:LaCl3can be induced upon excitation into2G7/2+4G5/2in the yellow region. Upconversion occurs via an energy transfer mechanism with or without excited-state absorption. Analysis of the upconversion tran-sient of4D3/2→4I11/2radiative transition at 12K leads to a rate constantwt1=1468 s-1for the energy transfer step. The lifetimes of the main fluorescence levels of Nd3+: LaCl3and NdCl3in the visible range were measured and the values are compared and discussed.
Key words:  Upconversion, Transfer rate, Lifetimes, Nd3+: LaCl3and NdCl3crystals
FundProject:国家自然科学基金资助项目(批准号:19874058)
Nd3+:LaCl3中的上转换发光研究
尹民,KrupaJ.C.
摘要:
当用582.6nm的黄色激光激发Nd3+:LaCl3的2G7/2+4G5/2能级时,观察到了4D3/2和2G9/2能级的兰光和紫外发射.研究表明,2D3/2上转换的机理是能量传递和激发态吸收,而2G9/2则是由于4G5/2+4Gs/2→2G9/2+4F7/2交叉驰豫过程.通过对12K下4D3/2→4I11/2荧光衰减曲线的分析,得出能量传递几率为wt1=1468s-1.测量和讨论了Nd3+:LaCl3和NdCl3主要发光能级室温和12K下的寿命.
关键词:  能量上转换  传递几率  寿命  Nd3+:LaCl3和NdCl3晶体
DOI:10.1088/1674-0068/14/1/40-46
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