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Updated: Jun 9, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Plasmon resonances and near-field optical microscopy: a self-consistent theoretical model
Applied Optics
|August 25, 2010
Summary
This study investigates electromagnetic optical interactions between a metal sphere and a surface. Findings reveal spatial dependence and pseudoperiodic oscillations, crucial for understanding near-field optical microscopy.
Area of Science:
- Condensed matter physics
- Optical physics
- Nanophotonics
Background:
- Understanding electromagnetic interactions is key in nanophotonics.
- Near-field optical microscopy relies on localized electromagnetic fields.
- Metal nanoparticles exhibit unique optical properties.
Purpose of the Study:
- To investigate electromagnetic optical interactions between a small metal sphere and a metallic surface.
- To analyze the scattered light intensity based on polarization and separation distance.
- To explore the role of retardation effects and plasmon modes.
Main Methods:
- A self-consistent approach was employed to model the interactions.
- The response function of the interacting systems was locally treated.
- Retardation effects were incorporated using a dipolar propagator.
Main Results:
- Scattered light intensity showed spatial dependence on the approach distance.
- Pseudoperiodic oscillations were observed at larger separations due to retardation effects.
- Narrow resonances in scattered intensity were found in the near-field range due to plasmon modes.
Conclusions:
- The model accurately reproduces experimental observations in near-field optics.
- Retardation effects and plasmon modes significantly influence optical interactions.
- This work provides insights into the physics of probe-surface interactions in optical microscopy.
