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Updated: Jun 17, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Performance-enhanced superluminescent diode with surface plasmon waveguide.

Mehdi Ranjbaran1, Xun Li

  • 1Photonics Research Group, Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, L8S 4K1 Canada. ranjbam@mcmaster.ca

Optics Express
|January 7, 2010
PubMed
Summary
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A novel Superluminescent Diode (SLD) design utilizes surface plasmon waveguides (SPWG) for enhanced light guidance. This new structure significantly boosts spontaneous emission coupling, outperforming conventional dielectric waveguides in output power and spectral width.

Area of Science:

  • Optoelectronics
  • Photonics
  • Materials Science

Background:

  • Conventional Superluminescent Diodes (SLDs) rely on dielectric waveguides for light confinement.
  • Improving spontaneous emission coupling is crucial for enhancing SLD performance.
  • Existing designs face limitations in output power and spectral characteristics.

Purpose of the Study:

  • To propose and analyze a novel SLD structure utilizing surface plasmon waveguides (SPWG).
  • To investigate the impact of SPWG on spontaneous emission coupling efficiency.
  • To compare the performance of the new design against conventional dielectric waveguide SLDs.

Main Methods:

  • Theoretical design and simulation of an SLD incorporating an SPWG.
  • Analysis of key device parameters including confinement factor, waveguide loss, and facet reflectivities.

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  • Comparative performance evaluation based on output power and optical spectral width.

    • Main Results:

    • The proposed SPWG-based SLD demonstrates significantly increased spontaneous emission coupling.
    • The new design exhibits superior output power compared to conventional dielectric waveguide SLDs.
    • The optical spectral width is also improved in the novel SPWG-based SLD structure.

    Conclusions:

    • Surface plasmon waveguides offer a promising alternative to dielectric waveguides for SLD applications.
    • The novel SLD design presents a significant advancement in device performance, offering higher output power and broader spectral width.
    • This work paves the way for next-generation optoelectronic devices with enhanced light emission characteristics.