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Related Experiment Video

Updated: Jun 22, 2026

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

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Annular photonic crystals.

Hamza Kurt, D S Citrin

    Optics Express
    |June 9, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel annular photonic-crystal (PC) structure. This new design significantly enhances the photonic band gap, offering improved performance for optical applications.

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    Area of Science:

    • Condensed matter physics
    • Materials science
    • Optics

    Background:

    • Photonic crystals (PCs) are periodic dielectric structures that control light propagation.
    • Conventional PCs with air holes in a dielectric background have limitations in band gap size and frequency.

    Purpose of the Study:

    • To investigate a new two-dimensional annular photonic-crystal (PC) structure.
    • To analyze the impact of dielectric rods within air holes on the PC's band gap properties.

    Main Methods:

    • Studied annular PC structures with dielectric rods centered in circular air holes within square and triangular lattices.
    • Analyzed modifications to the dispersion diagram and photonic band gap characteristics.

    Main Results:

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    Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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  • Dielectric rods significantly alter the dispersion diagram, even at low volume fractions (<12%).
  • Increasing rod radius initially reduces and closes the band gap, but further increase surprisingly opens a new band gap.
  • The annular PC structure considerably enhances the photonic band gap size for both square and triangular lattices compared to conventional structures.

    • Conclusions:

    • The annular PC structure offers a method to achieve a complete photonic band gap at low normalized frequencies.
    • This approach maintains structural symmetry and enhances band gap properties, showing promise for optical device applications.