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Updated: Jun 11, 2026

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

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Published on: November 30, 2012

Wavelength conversion by dynamically reconfiguring a nested photonic crystal cavity.

Amin Khorshidahmad1, Andrew G Kirk

  • 1Photonic Systems Group, Department of Electrical and Computer Engineering, McGill University, 3480 University, Montreal, Quebec H3A 2A7, Canada. amin.khorshidahmad@mail.mcgill.ca

Optics Express
|July 1, 2010
PubMed
Summary
This summary is machine-generated.

We propose a tunable photonic crystal cavity for frequency conversion. It achieves over 90nm wavelength shifts by dynamically switching between cavities, enabling efficient light manipulation.

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Area of Science:

  • Photonics
  • Optical Engineering
  • Materials Science

Background:

  • Photonic crystal cavities are crucial for manipulating light.
  • Frequency conversion requires precise control over optical modes.
  • Existing methods often lack dynamic tunability and broad spectral shifts.

Purpose of the Study:

  • To propose a novel dynamically reconfigurable nested photonic crystal cavity.
  • To enable efficient wavelength conversion for optical communication applications.
  • To demonstrate a significant spectral shift using spatial refractive index tuning.

Main Methods:

  • Numerical simulations of a nested photonic crystal cavity design.
  • Dynamic switching between two distinct cavity configurations.
  • Spatially-uniform tuning of the refractive index.
  • Analysis of Eigen modes and intermodal transitions.

Main Results:

  • Achieved dynamic switching between two cavities via refractive index tuning.
  • Demonstrated successful intermodal transition for wavelength conversion.
  • Precluded adiabatic wavelength conversion by excluding initial resonant modes.
  • Suppressed unwanted intermodal transitions using cavity mode symmetry.
  • Numerically showed over 90nm wavelength shift (L-band to S-band).

Conclusions:

  • The proposed dynamically reconfigurable photonic crystal cavity is suitable for frequency conversion.
  • The design enables large, controlled wavelength shifts.
  • This work offers a promising platform for advanced optical signal processing.