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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Slow light waveguides based on bound states in the continuum.

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    We demonstrate a slow light waveguide using bound states in the continuum (BIC) for advanced light confinement. Periodic modulation enables high group index and low loss, expanding integrated photonics applications.

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    Area of Science:

    • Photonics and optical engineering
    • Materials science

    Background:

    • Bound states in the continuum (BIC) offer advanced light confinement in leaky optical systems.
    • Leaky guided modes in slab waveguides can couple to radiation continua.

    Purpose of the Study:

    • To propose and numerically demonstrate a slow light waveguide utilizing a BIC mode.
    • To investigate the impact of periodic modulation on waveguide performance.

    Main Methods:

    • Numerical simulation of a polymer core waveguide on a plane slab.
    • Analysis of leaky guided modes coupled to a radiation continuum.
    • Introduction of periodic modulation to the polymer core.

    Main Results:

    • Periodic modulation creates a high group index slow light mode.
    • The BIC confinement results in low propagation loss.
    • Integration of 1D photonic crystals enhances functionality.

    Conclusions:

    • The proposed BIC waveguide offers efficient slow light propagation.
    • This technology has significant potential for integrated photonics.
    • Periodic modulation is key to achieving high performance.