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$Interference and Diffraction$ 02:18

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Simple model for the observed plasmon conical radiation interference patterns in a kretschmann configuration.

P R Auvil, J B Ketterson, Y K Kim

|February 28, 2008

Summary

Researchers developed a simple model for multiple-scattering images obtained with a scanning plasmon optical microscope. This model accurately reproduces experimental data, advancing surface irregularity analysis.

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Area of Science:

Optics
Materials Science
Surface Science

Background:

Previous studies presented experimental results from a scanning plasmon optical microscope (SPOM) in Kretschmann configuration.
Measurements included angular distribution of conical radiation and detection of multiple-scattering images.

Purpose of the Study:

To develop and validate a simple model for analyzing multiple-scattering images generated by SPOM.
To compare the model's predictions with experimental data for surface irregularities.

Main Methods:

Utilized experimental data from previous SPOM measurements.
Developed a simplified theoretical model for multiple-scattering image formation.
Compared model predictions with experimental angular distribution and image data.

Main Results:

The developed model successfully reproduced experimental data.
Excellent agreement was found between the model and the measured multiple-scattering images.
The study validates the model for analyzing surface features.

Conclusions:

A simple model effectively explains multiple-scattering images in SPOM.
The model provides a valuable tool for characterizing surface irregularities using plasmon optics.
Further refinement of the model could enhance nanoscale surface analysis capabilities.