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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.

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Summary
This summary is machine-generated.

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.

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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.