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Updated: Jul 1, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Light-driven circular plasmon current in a silver nanoring.

¹Department of Chemistry, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. szou@mail.ucf.edu

|September 17, 2008

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Researchers demonstrated a circular plasmon current in silver nanorings using electromagnetic waves. This finding could advance artificial materials with negative refractive index and nanoelectronic devices.

Area of Science:

Plasmonics
Nanophotonics
Electrodynamics

Background:

Plasmonic effects in metallic nanostructures are crucial for light manipulation.
Understanding current flow at the nanoscale is key to developing advanced optical devices.

Purpose of the Study:

To demonstrate and investigate circular plasmon currents in silver nanorings.
To explore the conditions and parameters affecting these currents.
To assess the potential applications in metamaterials and nanoelectronics.

Main Methods:

Theoretical investigation using electrodynamics.
Simulation of electromagnetic wave interaction with silver nanorings.

Main Results:

A circular plasmon current was achieved in a 50 nm thick silver nanoring (200 nm inner, 300 nm outer diameter) at a 650 nm incident wavelength.

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The current formation requires the incident wave and polarization to be parallel to the ring plane.

Resonance wavelength red-shifts with increased ring diameter and decreased thickness.

Conclusions:

The study successfully demonstrates and characterizes circular plasmon currents in silver nanorings.
This phenomenon offers potential for designing visible-wavelength artificial materials with negative refractive index.
The findings may inspire novel nanoelectronic device concepts.