LiKGdF_5∶Er^(3+),Sm^(3+)单晶的VUV光谱和量子剪裁  

VUV spectra and quantum cutting of LiKGdF_5: Er, Sm single crystal

作　　者：董宁[1] 徐美[1] 张慰萍[1] 尹民[1] 陶冶[2] Makhov V N Khaiduhov N M Krupa J C 

机构地区：[1]中国科学技术大学结构分析重点实验室物理系 [2]中国科学院高能物理研究所同步辐射实验室 [3]Lebedev Physical Institute Moscow 117924,Russia [4]Kurnakov Inshote of General and Inorganic Chemistry Moscow 117907,Russia [5]Institude Pbysiquc Nucléaire CNRS-IN2P3,91406 Orsay Cedex,Frmce

出　　处：《核技术》2004年第12期909-913,共5页Nuclear Techniques

基　　金：国家自然科学基金(10074061);教育部<跨世纪优秀人才培养计划>基金;教育部博士点基金(20020358003)

摘　　要：报道了LiKGdF_5:Er(2%),Sm(0.4%)单晶在紫外激光(三倍频Nd:YAG激光,355nm)和同步辐射真空紫外光激发下的光谱特性,讨论了不同激发下Er^(3+)离子和Sm^(3+)离子的相对发射强度及其物理机理。通过真空紫外激发光谱的测量,确定了本材料中Sm^(3+)离子的4f^45d吸收带以及Er^(3+)离子的4f^(10)5d吸收带的能量位置。实验结果表明,当激发Er^(3+)的4f^(10)5d吸收带,可以产生量子效率大于100%的量子剪裁现象,并给出了其物理模型。Spectroscopic properties of LiKGdF_5: Er(2%), Sm(0.4%) single crystal under UV laser and synchrotron VUV light excitation were studied. The energy positions of absorption band for the 4f^45d of Sm^(3+) and 4f^(10)5d of Er^(3+) ions were determined through the measurements of excitation spectra in the VUV region. The results show that when the 4f^(10)5d band of Er^(3+) ions was excited, quantum cutting was achieved. A model for the phenomena was also presented.

关 键 词：LiKGdF5:Er(2%) Sm(0.4%)单晶 真空紫外光谱 量子剪裁 

分 类 号：O482.3[理学—固体物理]