Enhancement of upconversion luminescence of Er and Yb co-doped Y2O3 nanoparticle by Ag half-shell

被引：17
|
作者：
Kodama, Toshiyuki [1 ]
Fujii, Minoru [1 ]
Nakano, Taishi [1 ]
Imakita, Kenji [1 ]
Hayashi, Shinji [1 ]
机构：
[1] Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Nada Ku, Kobe, Hyogo 6578501, Japan
来源：
OPTICAL MATERIALS | 2013年 / 35卷 / 12期
关键词：
Upconversion; Nanoparticle; Surface plasmon; Metal half-shell; NEAR-INFRARED EMISSION; FLUORESCENCE;
D O I：
10.1016/j.optmat.2013.06.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Upconversion photoluminescence (PL) properties of single Y2O3 nanoparticles doped with Yb and Er (Y2O3:Yb,Er) with a Ag over-layer is studied. We traced the PL and light scattering images of individual nanoparticles by changing the thickness of a Ag over-layer. When the Ag thickness is relatively small and only the upper part of a nanoparticle is covered by Ag (Ag half-shell), the PL is strongly enhanced. On the other hand, when the Ag thickness is increased and a continuous Ag over layer is formed, the enhancement factor decreases. From the correlation between the enhancement factors of the upconversion PL and scattering intensities as well as the change of the PL lifetime, the mechanism of the PL enhancement is discussed. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：2394 / 2399
页数：6
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