Photoluminescence Plasmonic Enhancement of Single Quantum Dots Coupled to Gold Microplates

被引：42

作者：

Song, Min ^{[1
]}

Wu, Botao ^{[1
]}

Chen, Gengxu ^{[1
]}

Liu, Yan ^{[1
]}

Ci, Xueting ^{[1
]}

Wu, E. ^{[1
]}

Zeng, Heping ^{[1
]}

机构：

[1] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 16期

基金：

高等学校博士学科点专项科研基金;

关键词：

CHEMICALLY SYNTHESIZED GOLD; SEMICONDUCTOR NANOCRYSTALS; EMISSION; FLUORESCENCE; DECONVOLUTION; METAL;

D O I：

10.1021/jp408305x

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optical properties of quantum dots can be drastically changed by surface plasmons excited in neighboring metallic nanostructures. Here we investigated the photoluminescence enhancement dependence of single quantum dots on the separation distance with Au microplates by a single particle spectroscopy. The quantum dot-Au microplate hybrid structures provided a photoluminescence enhancement of up to similar to 16-fold when the separation distance between the surface of Au microplate and the center of QD was 18 +/- 1.9 nm. Accordingly, the lifetime of those quantum dots was shortened compared with the ones on glass plates directly. Theoretical simulation revealed that the variation of photoluminescence enhancement was closely dependent on the separation distance between the QD and the Au microplate, in good agreement with the experimental results.

引用

页码：8514 / 8520

页数：7

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