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Proceedings Paper

Plasmonic effect on photon antibunching and blinking behavior of single quantum dots near gold nanoparticles
Author(s): Swayandipta Dey; Yadong Zhou; Xiangdong Tian; Julie A. Jenkins; Ou Chen; Shengli Zou; Jing Zhao
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Paper Abstract

In this work, we investigated how the blinking statistics and the photon antibunching behavior of single CdSe/CdS core/shell quantum dots(QDs) get modified in the presence of gold nanoparticles(Au NPs) overcoated with a silica shell of varying thickness.(Au@SiO2). The Au@SiO2 NPs have distinct plasmon resonance peaks which overlap with the absorption and emission of QDs, thereby effectively increasing the mutual plasmon-exciton interactions between them. From the second-order photoluminescence intensity cross-correlation measurements, we observed that in the regime of low excitation power, the relative ratio of the biexciton/exciton (BX/X) quantum yield (QY) and lifetimes of the single QDs in presence of the plasmonic substrates get significantly modified as compared to the QDs on glass. An electrodynamics model was developed to further quantify the effect of plasmons on the emission intensity, QY and lifetimes of X and BX of single QDs. The theoretical studies also indicated that the relative position of the QDs and orientation of the electric field are the critical factors regulating the emission properties of Xs and BXs.

Paper Details

Date Published: 27 February 2015
PDF: 13 pages
Proc. SPIE 9373, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII, 93730D (27 February 2015); doi: 10.1117/12.2075589
Show Author Affiliations
Swayandipta Dey, Univ. of Connecticut (United States)
Yadong Zhou, Univ. of Central Florida (United States)
Xiangdong Tian, Univ. of Connecticut (United States)
Julie A. Jenkins, Univ. of Connecticut (United States)
Ou Chen, Massachusetts Institute of Technology (United States)
Shengli Zou, Univ. of Central Florida (United States)
Jing Zhao, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 9373:
Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII
Diana L. Huffaker; Holger Eisele, Editor(s)

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