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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
09:00

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Published on: December 11, 2013

Long-range spiralling surface plasmon modes on metallic nanowires.

M A Schmidt1, P St J Russell

  • 1Max Planck Research Group (IOIP), University of Erlangen-Nuremberg, Günther-Scharowsky-Str 1/Bau 24, 91058 Erlangen, Germany.

Optics Express
|September 6, 2008
PubMed
Summary
This summary is machine-generated.

Metallic nanowires support low-loss surface plasmon (SP) modes, even with a lower refractive index than the surrounding dielectric. A helical path model accurately describes these SP modes, relevant for optical fibers.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Surface plasmons (SPs) are electromagnetic waves coupled to electron oscillations on metal surfaces.
  • Metallic nanowires offer unique optical properties for guiding light at the nanoscale.

Purpose of the Study:

  • To investigate the characteristics of surface plasmon modes guided on metallic nanowires.
  • To evaluate the accuracy of a simplified helical path model for these modes.
  • To assess the relevance for 2D arrays of metallic nanowires in fiber optics.

Main Methods:

  • Theoretical analysis of surface plasmon modes on circular metallic nanowires.
  • Inclusion of ohmic losses in the metal.
  • Detailed assessment of a helical path model for SPs.

Main Results:

  • Metallic nanowires can support low-loss guided SP modes.
  • These modes can be bound to the nanowire even when its refractive index is lower than the surrounding dielectric.
  • The helical path model provides an accurate description of SP modes at specific pitch angles.

Conclusions:

  • Metallic nanowires are promising for guiding surface plasmon modes with low loss.
  • The helical path model is a valuable tool for understanding SP behavior on nanowires.
  • Findings are applicable to the development of optical fibers with 2D metallic nanowire arrays.