Yb:YAG晶体的合作发光现象  

Cooperative Luminescence in Yb:YAG Crystals

作　　者：毛艳丽[1] 丁菲[1] 王长顺[1] 邓佩珍[2] 干福熹[2] 

机构地区：[1]河南大学物理与信息光电子学院,河南开封475001 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光谱学与光谱分析》2005年第8期1199-1202,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(60177003)资助项目

摘　　要：研究了Yb:YAG晶体的合作发光现象。当用940nm的近红外光激发时,Yb:YAG晶体有明显的上转换蓝色发光。实验发现498nm的蓝色发光强度与激发功率的平方成正比,而且Yb3+掺杂浓度越高,蓝色发光越强。分析表明这是Yb3+间强的相互作用导致的合作发光,是由于Yb3+在共价性的YAG基质中,它的4f13电子易于与近邻离子发生相互作用导致的。Cooperative luminescence phenomenon of Yb： YAG crystals was studied. Up-converted blue luminescence was obviously observed in Yb： YAG under excitation in the near-infrared region with a wavelength 940 nm. Experimental evidence was provided by the fact that the intensity of 498 nm luminescence shows a quadratic dependence on excitation power, and the intensity of blue luminescence increased with the increase in Yb ion concentration. It is concluded that this luminescence is due to a cooperative process resulting from a strong interaction of Yb ions. The cooperative luminescence is possiblely assigned to the strong interaction of 4f^13 electrons and neighboring Yb^3＋ ions in a covalent host lattice such as YAG. Theoretical cooperative luminescence spectrum was calculated.

关 键 词：合作发光 YB:YAG晶体 上转换发光 

分 类 号：O782[理学—晶体学]