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Optical quantum yield in plasmonic nanowaveguide
Mahi R Singh1, Grant Brassem1, Sergey Yastrebov2
1Department of Physics and Astronomy, The University of Western Ontario, London N6A 3K7, Canada.
Nanotechnology
|December 3, 2020
Summary
We developed a theory for quantum yield in plasmonic nanowaveguides using quantum dots and metallic nanoparticles. Increased nanoparticle interaction reduces quantum yield, while surface plasmon polaritons enhance photoluminescence.
Area of Science:
- Nanophotonics
- Quantum Optics
- Materials Science
Background:
- Plasmonic nanowaveguides offer unique light-matter interaction properties.
- Quantum dots and metallic nanoparticles are key components in advanced optical devices.
Purpose of the Study:
- To develop a theoretical model for quantum yield in plasmonic nanowaveguides.
- To investigate the influence of nanoparticle interactions and surface plasmon polaritons on optical properties.
Main Methods:
- Transfer matrix method based on Maxwell equations to calculate bound states.
- Quantum mechanical perturbation theory to calculate exciton linewidths.
- Comparison of theoretical predictions with experimental data.
Main Results:
- Number of bound states depends on dielectric properties of core and cladding.
- Quantum yield decreases with increasing dipole-dipole interaction between metallic nanoparticles.
- Surface plasmon polaritons enhance photoluminescence, while quantum yield can cause quenching.
Conclusions:
- The developed theory accurately predicts experimental results for Ag-nanoparticle/perovskite quantum dot nanowaveguides.
- Analytical expressions for quantum yield and photoluminescence can guide future experiments.
- Potential applications include the development of novel nanosensors and nanoswitches.
