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Optical addressing at the subwavelength scale

Weeber1, Dereux, Girard

  • 1Laboratoire de Physique de l'Universite de Bourgogne, Optique Submicronique, Boiinsertion markte Postale 47870, F-21078 Dijon, France.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|December 2, 2000
PubMed
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Researchers explored dielectric subwavelength structures for optical applications. These structures, acting as subwavelength optical waveguides (SOWs), can confine and guide light, potentially enabling the excitation of single nanoscopic objects.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Dielectric subwavelength structures offer unique optical properties.
  • Coplanar geometry presents challenges and opportunities for light manipulation.

Purpose of the Study:

  • To investigate the optical properties of dielectric subwavelength structures.
  • To explore their potential as subwavelength optical waveguides (SOWs).
  • To analyze light propagation and coupling in these structures.

Main Methods:

  • Application of the Green dyadic formalism.
  • Modeling of homogeneous and heterogeneous dielectric wires.
  • Simulation of light coupling with focused Gaussian beams.

Main Results:

  • Homogeneous wires exhibit guiding properties and can couple with local illumination.

Related Experiment Videos

  • Subwavelength optical waveguides (SOWs) provide confined light sources for nanoscopic objects.
  • Heterogeneous wires propagate Gaussian beams with minimal damping in the visible range.
  • Transmission spectra of heterowires may show narrow gaps.

    • Conclusions:

    • Dielectric subwavelength structures can function as effective optical waveguides.
    • These SOWs have potential applications in nanophotonics and single-object excitation.
    • The study provides insights into the relationship between SOW optical properties and electromagnetic local density of states.