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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Surface plasmon polaritons on metallic surfaces.

Armis R Zakharian, Jerome V Moloney, Masud Mansuripur

|June 18, 2009

Summary

This study clarifies surface plasmon polaritons (SPPs) on metallic surfaces, detailing their wave nature, excitation conditions, and strength limitations. Finite Difference Time Domain simulations visualize SPP behavior in a metallic slit, revealing simultaneous excitation of plasmonic and guided modes.

Area of Science:

Optics and Photonics
Condensed Matter Physics
Computational Electromagnetics

Background:

Surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
Understanding SPP excitation and behavior is key for plasmonic device development.
Maxwell's equations govern SPP properties, but their application to complex geometries requires detailed analysis.

Purpose of the Study:

To provide a unified theoretical framework for SPPs on flat metallic surfaces and interfaces.
To elucidate the conditions necessary for launching SPPs and the constraints imposed by electromagnetic theory.
To investigate the simultaneous excitation of SPPs and guided modes in a subwavelength slit structure.

Main Methods:

Theoretical analysis of surface plasmon polaritons.

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Application of Maxwell's equations to determine SPP properties.

Finite Difference Time Domain (FDTD) simulations for electromagnetic field and energy flow visualization.

Main Results:

A comprehensive understanding of SPP nature, launch conditions, and strength limitations is established.
FDTD simulations provide detailed insights into electromagnetic field distribution and energy flow.
The study demonstrates simultaneous excitation of plasmonic waves and guided modes in a metallic slit.

Conclusions:

The research clarifies fundamental aspects of surface plasmon polaritons.
The findings are crucial for designing and optimizing plasmonic devices utilizing metallic nanostructures.
Simulations confirm the interplay between SPPs and guided modes in subwavelength structures.