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Title: Manipulating nonlinear emission and cooperative effect of CdSe/ZnS quantum dots by coupling to a silver nanorod complex cavity
Authors: Nan, Fan
Cheng, Zi-Qiang
Wang, Ya-Lan
Zhang, Qing
Zhou, Li
Yang, Zhong-Jian
Zhong, Yu-Ting
Liang, Shan
Xiong, Qihua
Wang, Qu-Quan
Keywords: DRNTU::Science::Physics
Issue Date: 2014
Source: Nan, F., Cheng, Z.-Q., Wang, Y.-L., Zhang, Q., Zhou, L., Yang, Z.-J., et al. (2014). Manipulating Nonlinear Emission and Cooperative Effect of CdSe/ZnS Quantum Dots by Coupling to a Silver Nanorod Complex Cavity. Scientific Reports, 4. 4839-.
Series/Report no.: Scientific reports
Abstract: Colloidal semiconductor quantum dots have three-dimensional confined excitons with large optical oscillator strength and gain. The surface plasmons of metallic nanostructures offer an efficient tool to enhance exciton-exciton coupling and excitation energy transfer at appropriate geometric arrangement. Here, we report plasmon-mediated cooperative emissions of approximately one monolayer of ensemble CdSe/ZnS quantum dots coupled with silver nanorod complex cavities at room temperature. Power-dependent spectral shifting, narrowing, modulation, and amplification are demonstrated by adjusting longitudinal surface plasmon resonance of silver nanorods, reflectivity and phase shift of silver nanostructured film, and mode spacing of the complex cavity. The underlying physical mechanism of the nonlinear excitation energy transfer and nonlinear emissions are further investigated and discussed by using time-resolved photoluminescence and finite-difference time-domain numerical simulations. Our results suggest effective strategies to design active plasmonic complex cavities for cooperative emission nanodevices based on semiconductor quantum dots.
ISSN: 2045-2322
DOI: 10.1038/srep04839
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The images in this article are included in the article's Creative Commons license, unless indicated otherwise in the image credit; if the image is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the image. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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