Enhanced photoluminescence of CdSe quantum dots by the coupling of Ag nanocube and Ag film

The coupling of local surface plasmon （LSP） of nanoparticle and surface plasmon （SP） mode produced by metal film can lead to the enhanced electromagnetic field, which has an important application in enhancing the fluorescence of quantum dots （QDs）. Herein, the Ag nanocube and Ag film are used to enh...

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Published inChinese physics B Vol. 23; no. 8; pp. 65 - 70
Main Authors Jiang, Tong-Tong, Shao, Wei-Jia, Yin, Nai-Qiang, Liu, Ling, Song, Jiang-Lu-Qi, Zhu, Li-Xin, Xu, Xiao-Liang
Format Journal Article
LanguageEnglish
Published 01.08.2014
Subjects
Ag膜
Cadmium selenides
Fluorescence
Intermetallics
Joining
Mathematical models
Nanostructure
Quantum dots
Silver
光致发光
硒化镉
立方体
纳米颗粒
耦合
表面等离子体激元
量子点
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Summary:The coupling of local surface plasmon （LSP） of nanoparticle and surface plasmon （SP） mode produced by metal film can lead to the enhanced electromagnetic field, which has an important application in enhancing the fluorescence of quantum dots （QDs）. Herein, the Ag nanocube and Ag film are used to enhance the fluorescence of CdSe QDs. The enhancement is found to relate to the sizes of the Ag nanocube and the thickness of the Ag film. Moreover, we also present the fluorescence enhancement caused by only SP. The result shows that the coupling between metal nanoparticles and metal film can realize larger field enhancement. Numerical simulation verifies that a nanocube can localize a strong electric field around its comer. All the results indicate that the fluorescence of QDs can be efficiently improved by optimizing the parameters of Ag film and Ag cubes.
Bibliography:Ag nanocube, local surface plasmon, Ag film, photoluminescence
The coupling of local surface plasmon （LSP） of nanoparticle and surface plasmon （SP） mode produced by metal film can lead to the enhanced electromagnetic field, which has an important application in enhancing the fluorescence of quantum dots （QDs）. Herein, the Ag nanocube and Ag film are used to enhance the fluorescence of CdSe QDs. The enhancement is found to relate to the sizes of the Ag nanocube and the thickness of the Ag film. Moreover, we also present the fluorescence enhancement caused by only SP. The result shows that the coupling between metal nanoparticles and metal film can realize larger field enhancement. Numerical simulation verifies that a nanocube can localize a strong electric field around its comer. All the results indicate that the fluorescence of QDs can be efficiently improved by optimizing the parameters of Ag film and Ag cubes.
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/8/086102