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Related Experiment Videos

Tunable photonic crystal microcavities.

David M Pustai1, Ahmed Sharkawy, Shouyuan Shi

  • 1Department of Electrical and Computer Engineering, The University of Delaware, Newark 19716, USA.

Applied Optics
|September 13, 2002
PubMed
Summary
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We developed a new method to tune photonic crystal microcavities by altering the refractive index of lattice sites using liquid crystals. This technique enhances wavelength division multiplexing in photonic crystal applications.

Area of Science:

  • Photonics
  • Materials Science
  • Optical Engineering

Background:

  • Photonic crystal microcavities are crucial for optical devices.
  • Tuning their properties is essential for advanced applications.
  • Existing tuning methods have limitations.

Purpose of the Study:

  • To present a novel method for actively tuning photonic crystal microcavities.
  • To analyze the impact of refractive index modulation on cavity performance.
  • To demonstrate the utility of tunable cavities in wavelength division multiplexing.

Main Methods:

  • Infiltrating anisotropic liquid crystals into a 2D photonic crystal lattice (air cylinders in silicon).
  • Actively modulating the refractive index of lattice sites.
  • Analyzing Q-factors and resonance frequencies of the tunable microcavity.

Related Experiment Videos

  • Integrating tunable cavities into a channel drop filter.

    • Main Results:

    • Demonstrated active modulation of refractive index in photonic crystal lattices.
    • Analyzed the relationship between index modulation and microcavity Q-factors and resonance frequencies.
    • Showcased enhanced performance in wavelength division multiplexing applications using tunable cavities.

    Conclusions:

    • The proposed liquid crystal infiltration method enables effective tuning of photonic crystal microcavities.
    • Tunable microcavities offer significant improvements for wavelength division multiplexing.
    • This method opens avenues for reconfigurable photonic integrated circuits.