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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

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Surface plasmon-like modes on structured perfectly conducting surfaces.

Yung-Chiang Lan, Ruey-Lin Chern

|June 17, 2009

Summary

Surface plasmon-like (SPL) modes on structured surfaces exhibit complex field patterns. Their dispersion relations are numerically derived, revealing mode splitting due to evanescent field interactions.

Area of Science:

Electromagnetism
Condensed Matter Physics
Materials Science

Background:

Surface plasmon-like (SPL) modes are electromagnetic surface eigenmodes.
These modes are supported by structured perfectly conducting surfaces.

Purpose of the Study:

To numerically solve and characterize SPL modes on structured surfaces.
To investigate the field patterns and dispersion relations of SPL modes.
To understand the phenomenon of SPL mode splitting.

Main Methods:

Standard eigenvalue-solving method was employed.
Numerical analysis of in-plane wavevectors was performed.
Dispersion relations were obtained numerically.

Main Results:

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Field patterns were identified as TE(10)-like and TE(11) for specific wavevectors.
Mode character changes with wavevector, preventing simple fundamental mode derivation.
SPL modes split into high-frequency anti-symmetric and low-frequency symmetric modes on thin conductors.

Conclusions:

The complex mode character necessitates numerical derivation of dispersion relations.
Mutual interaction of evanescent fields causes SPL mode splitting.
Understanding SPL modes is crucial for applications involving structured conductive surfaces.