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Updated: Jun 13, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Plasmon-enhanced Förster energy transfer between semiconductor quantum dots: multipole effects
Xiong-Rui Su1, Wei Zhang, Li Zhou
1Department of Physics, Wuhan University, Wuhan 430072, P. R. China.
Optics Express
|April 15, 2010
Summary
We demonstrated plasmon-assisted energy transfer between semiconductor quantum dots (QDs) using silver nanoparticles. Optimizing SiO2 coating thickness maximized energy transfer efficiency to 86%.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Dot Research
Background:
- Energy transfer (ET) is crucial in nanoscale systems.
- Semiconductor quantum dots (QDs) offer tunable optical properties.
- Plasmonics enables manipulation of light-matter interactions at the nanoscale.
Purpose of the Study:
- To experimentally demonstrate and optimize plasmon-assisted energy transfer (ET) between CdSe QDs.
- To investigate the effect of silver nanoparticle coating thickness on ET efficiency.
- To provide theoretical analysis supporting experimental observations.
Main Methods:
- Time-resolved micro-photoluminescence (PL) spectroscopy.
- Fabrication of QD monolayers on SiO2-coated silver nanoparticles.
- Rate equation modeling for theoretical analysis.
Main Results:
- Achieved maximum PL enhancement factor of ~47 for acceptor QDs.
- Observed maximum acceptor-to-donor PL intensity ratio of ~14.
- Reached a peak ET efficiency of 86% with 7 nm SiO2 coating.
- Experimental data aligned with theoretical predictions.
Conclusions:
- Plasmon-assisted ET between QDs is feasible and controllable.
- Optimized nanoparticle coating enhances ET efficiency significantly.
- Theoretical models confirm the roles of multipole effects and nanoparticle interactions in plasmon-enhanced Förster ET.
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