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Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:

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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

Femtosecond surface plasmon pulse propagation.

Zsolt L Sámson1, Peter Horak, Kevin F MacDonald

  • 1Optoelectronics Research Centre, University of Southampton, Highfield, Southampton SO17 1BJ, UK. zls@orc.soton.ac.uk

Optics Letters
|January 26, 2011
PubMed
Summary

Ultrafast surface plasmon-polariton pulses in metal/dielectric waveguides experience significant reshaping due to dispersion. Metallic nonlinearities alone can support self-focusing and self-compressing propagation modes.

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Last Updated: Jun 5, 2026

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Published on: July 21, 2018

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15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Area of Science:

  • Optics and Photonics
  • Condensed Matter Physics
  • Materials Science

Background:

  • Surface plasmon-polaritons (SPPs) are crucial for nanoscale light manipulation.
  • Understanding SPP pulse dynamics in waveguides is essential for optical device development.

Purpose of the Study:

  • To analyze ultrafast SPP pulse reshaping effects in metal/dielectric plasmon waveguides.
  • To investigate nonlinear propagation modes supported by these waveguides.

Main Methods:

  • Numerical analysis of ultrafast SPP pulse propagation.
  • Modeling of group velocity and loss dispersion effects.
  • Investigation of metallic nonlinearities.

Main Results:

  • Group velocity and loss dispersion significantly alter pulse duration and intensity decay (broadening/narrowing, acceleration/retardation) by tens of percentage points in the short-pulse regime.
  • Metallic nonlinearities alone can support soliton, self-focusing, and self-compressing propagation modes.

Conclusions:

  • Dispersion effects play a critical role in ultrafast SPP pulse shaping.
  • Nonlinear effects in metals offer pathways to control SPP propagation modes for advanced photonic applications.