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Silicon-based plasmonic waveguides.

Alexey V Krasavin1, Anatoly V Zayats

  • 1Centre for Nanostructured Media, IRCEP, The Queen's University of Belfast, Belfast, BT7 1NN, UK. a.krasavin@qub.as.uk

Optics Express
|July 1, 2010
PubMed
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Silicon-based plasmonic waveguides offer high photonic integration for telecommunication wavelengths. These waveguides are CMOS-compatible and enable high signal transfer rates, paving the way for hybrid electronic/photonic chips.

Area of Science:

  • Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Plasmonic waveguides are crucial for manipulating light at the nanoscale.
  • Silicon photonics offers high refractive index for strong light confinement.
  • CMOS compatibility is essential for integrating photonic devices with electronics.

Purpose of the Study:

  • To investigate silicon-based plasmonic waveguides for photonic signal manipulation.
  • To assess the compatibility of these waveguides with CMOS fabrication.
  • To evaluate their potential for high-speed optical communications and hybrid integration.

Main Methods:

  • Theoretical investigation and simulation of Si-based plasmonic waveguide structures.
  • Analysis of waveguide confinement, bending radius, and propagation loss using Al and Cu plasmonic materials.

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  • Evaluation of group velocity dispersion for signal transfer rate assessment.

    • Main Results:

    • Achieved strong light confinement with waveguide separations of ~10 nm and bending radii of 500 nm at telecommunication wavelengths.
    • Demonstrated CMOS compatibility using aluminum and copper plasmonic platforms.
    • Showcased potential for over 10 Tb/s signal transfer rates due to group velocity dispersion.
    • Identified configurations that compensate for surface plasmon polariton (SPP) propagation loss.

    Conclusions:

    • Si-based plasmonic waveguides are a promising platform for advanced photonic integration.
    • Their CMOS compatibility and high performance support future hybrid electronic/photonic chips.
    • These waveguides offer a pathway to overcome limitations in optical signal processing and transmission.