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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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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Characteristics of gap plasmon waveguide with stub structures.

Yousuke Matsuzaki1, Toshihiro Okamoto, Masanobu Haraguchi

  • 1Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, Minamijosanjima 2-1, Tokushima 770-8506, Japan.

Optics Express
|October 15, 2008
PubMed
Summary

Submicron metal-dielectric-metal plasmon waveguides with stub structures act as wavelength selective filters. Their transmission depends on plasmon wave phase relationships, enabling lossless bends and demultiplexers.

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Area of Science:

  • Photonics and Plasmonics
  • Nanophotonics
  • Optical Engineering

Background:

  • Plasmon waveguides are crucial for miniaturizing optical devices.
  • Wavelength selectivity and signal routing are key challenges in plasmonics.

Purpose of the Study:

  • To investigate submicron metal-dielectric-metal plasmon waveguides with stub structures as wavelength selective filters.
  • To explore the use of stub structures for creating lossless bends and optical demultiplexers in plasmonic circuits.

Main Methods:

  • Theoretical analysis and numerical simulations of metal-dielectric-metal plasmon waveguides incorporating finite-length stub structures.
  • Investigating the influence of stub geometry and phase relationships on transmission characteristics.

Main Results:

  • Demonstrated that stub-based plasmon waveguides function as submicron wavelength selective filters.
  • Transmission properties are critically dependent on the phase relationship between the direct and stub-returned plasmon waves.
  • Proposed designs for lossless 90-degree plasmon waveguide bends and functional stub-based demultiplexers (1:1 and wavelength selective).

Conclusions:

  • Stub structures offer a versatile platform for creating compact wavelength selective filters and functional components in plasmonic circuits.
  • The phase relationship of plasmon waves is a key design parameter for controlling filter and routing functionalities.
  • This work paves the way for advanced submicron plasmonic devices with tailored optical properties.