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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

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Published on: November 30, 2012

Coupling into slow-mode photonic crystal waveguides.

J P Hugonin1, P Lalanne, T P White

  • 1Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, RD 128, 91127, Palaiseau Cedex, France.

Optics Letters
|September 18, 2007
PubMed
Summary

We developed efficient light injectors for photonic crystal waveguides. These injectors achieve over 90% efficiency, enabling compact devices that interface slow light with classical waveguides.

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Area of Science:

  • Photonics
  • Waveguide Optics
  • Solid-State Physics

Background:

  • Photonic crystal waveguides offer unique light manipulation properties.
  • Coupling light efficiently into slow Bloch modes is challenging.
  • Slow light in photonic crystals enables compact optical devices.

Purpose of the Study:

  • To investigate efficient light injectors for coupling into slow Bloch modes.
  • To explore the performance of injectors in single-row defect photonic crystal waveguides.
  • To determine if compact photonic crystal devices can interface with classical waveguides.

Main Methods:

  • Utilized two-dimensional vectorial computations.
  • Employed a Bloch mode theory approach.
  • Analyzed injector performance for light coupling.

Main Results:

  • Achieved very high coupling efficiencies (>90%).
  • Required only short injector lengths (a few wavelengths).
  • Demonstrated efficiency even for slow group velocities (c/100-c/400).

Conclusions:

  • Efficient injectors enable seamless interfacing of photonic crystal devices with classical waveguides.
  • Compact photonic devices utilizing slow waves are feasible.
  • The proposed injectors overcome previous limitations in slow light coupling.