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High-efficiency coupling structure for a single-line-defect photonic-crystal waveguide.

Dennis W Prather, Janusz Murakowski, Shouyuan Shi

    Optics Letters
    |November 21, 2007
    PubMed
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    We developed a planar structure for efficient light coupling into photonic-crystal waveguides. This design achieves over 90% coupling efficiency, confirmed by simulations and initial experiments.

    Area of Science:

    • Photonics and optical engineering
    • Materials science and nanotechnology

    Background:

    • Efficient light coupling is crucial for integrated photonic devices.
    • Photonic-crystal waveguides offer unique light confinement properties.

    Purpose of the Study:

    • To design and fabricate a planar structure for efficient light coupling.
    • To couple light from a multimode waveguide into a single-line-defect photonic-crystal waveguide.

    Main Methods:

    • Finite-difference time-domain (FDTD) simulations for theoretical prediction.
    • Fabrication of the planar coupling structure.
    • Experimental characterization of the coupled light.

    Main Results:

    • Predicted coupling efficiency exceeding 90% via FDTD calculations.

    Related Experiment Videos

  • Demonstrated successful light coupling into the photonic-crystal waveguide.
  • Presented detailed device design, fabrication processes, and characterization data.

    • Conclusions:

    • The developed planar structure enables highly efficient light coupling into photonic-crystal waveguides.
    • The findings pave the way for advanced integrated photonic circuits.
    • Experimental validation confirms the potential of the proposed coupling scheme.