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Related Experiment Videos

Efficient photonic crystal directional couplers.

Morten Thorhauge1, Lars H Frandsen, Peter I Borel

  • 1Center for Communications, Optics and Materials, Technical University of Denmark, Building 345V, DK-2800, Kgs. Lyngby, Denmark. mthor@fysik.dtu.dk

Optics Letters
|September 6, 2003
PubMed
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Researchers developed a novel photonic crystal directional coupler for efficient broadband light coupling. This new design uses smaller holes in silicon-on-insulator material for improved performance.

Area of Science:

  • Photonics
  • Materials Science
  • Optical Engineering

Background:

  • Directional couplers are key components in integrated photonics.
  • Achieving broadband and spectrally flat coupling remains a challenge.
  • Photonic crystals offer unique light manipulation properties.

Purpose of the Study:

  • To demonstrate highly efficient and spectrally flat broadband coupling.
  • To introduce a novel design for photonic crystal directional couplers.
  • To validate simulation results with experimental data.

Main Methods:

  • Utilized a planar hexagonal photonic crystal lattice in silicon-on-insulator.
  • Implemented a novel design featuring smaller holes between waveguides.
  • Employed three-dimensional finite-difference time domain (3D FDTD) modeling.

Related Experiment Videos

  • Fabricated and measured performance of the designed couplers.

    • Main Results:

    • Achieved highly efficient and spectrally flat broadband coupling.
    • Demonstrated efficient channel-to-channel coupling via the novel design.
    • 3D FDTD modeling results closely matched experimental measurements.

    Conclusions:

    • The novel photonic crystal directional coupler design enables efficient broadband coupling.
    • This design offers a promising solution for integrated photonic devices.
    • The study validates the accuracy of 3D FDTD modeling for such structures.