Effect of Gold Nanoparticles on Fluorescence Spontaneous Emission of Quantum Dots

被引：4

作者：

Wan Jianing ^{[1
]}

Lin Yu ^{[1
]}

Zhong Ying ^{[2
]}

Liu Haitao ^{[1
]}

机构：

[1] Nankai Univ, Coll Elect Informat & Opt Engn, Inst Modern Opt, Key Lab Opt Informat Sci & Technol,Minist Educ, Tianjin 300350, Peoples R China

[2] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Sate Key Lab Precis Measuring Technol & Instrumen, Tianjin 300072, Peoples R China

来源：

LASER & OPTOELECTRONICS PROGRESS | 2018年 / 55卷 / 07期

关键词：

materials; quantum dot; metallic nanoparticle; fluorescence lifetime; spontaneous emission rate;

D O I：

10.3788/LOP55.071601

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The effect of gold nanoparticles on the fluorescence spontaneous emission of CdSc/ZnS quantum dots (QDs) is investigated based on the time-correlated single photon counting technique. The quantum dot samples coupled with gold nanoparticles effectively arc prepared. The fluorescence lifetime of QDs with a high concentration is measured, and it is found that the fluorescence lifetime of QDs can be significantly reduced by the gold nanoparticles. The fluorescence properties of a single QD arc also studied and it is found that the fluorescence lifetime of the quantum dot coupled with gold nanoparticles is reduced to about one percent of that without gold nanoparticles. The effects of the polarization direction of QDs, the distance between the QDs and the gold nanoparticles, the diameters of gold nanoparticles and other parameters on the fluorescence spontaneous emission rate of QDs arc investigated by the numerical calculation.

引用

页数：8

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