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Related Experiment Video

Updated: Nov 1, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Engineered nanophotonic waveguide with ultra-low dispersion.

Rahul Dev Mishra, Lalit Singh, Swati Rajput

    Applied Optics
    |June 18, 2021
    PubMed
    Summary

    Engineered silicon hybrid plasmonic waveguides offer ultra-low dispersion and electrical tunability for advanced photonic devices. This breakthrough enables efficient nonlinear signal processing and nanoscale integrated photonics at telecommunication wavelengths.

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    Area of Science:

    • Photonics
    • Materials Science
    • Electrical Engineering

    Background:

    • Plasmonic waveguides offer nanoscale light confinement.
    • Dispersion management is critical for high-performance photonic devices.
    • Electrical tunability is desired for active photonic components.

    Purpose of the Study:

    • To propose and analyze a silicon-based engineered hybrid plasmonic waveguide.
    • To achieve ultra-low dispersion and electrical tunability.
    • To explore its potential for nonlinear signal processing and integrated photonic devices.

    Main Methods:

    • Numerical simulation of a ridge-shaped nanophotonic waveguide.
    • Utilizing the plasma dispersion effect in silicon for electrical tuning.
    • Analysis of dispersion characteristics, propagation loss, and effective refractive index.

    Main Results:

    • Ultra-low dispersion of 1.28 ps²/m at 1550 nm.
    • Dual flatband dispersion over a 370 nm range.
    • Six zero-dispersion wavelengths and electrically tunable refractive index.
    • Propagation loss of 15.3 dB/mm with confinement in 15 nm SiO₂.

    Conclusions:

    • The proposed waveguide demonstrates significant potential for electrically tunable devices.
    • Ultra-low dispersion and tunability are key for nonlinear signal processing applications.
    • This nanophotonic waveguide is suitable for integrated photonic devices and advanced applications like wavelength conversion and supercontinuum generation.