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Related Experiment Video

Updated: Jun 11, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Broadband coupler between silicon waveguide and hybrid plasmonic waveguide.

Yi Song1, Jing Wang, Qiang Li

  • 1Laboratory of Photonics and Microwave Engineering, School of Information and Communication Technology, Royal Institute of Technology, Electrum 229, 164 40 Kista, Sweden.

Optics Express
|July 1, 2010
PubMed
Summary

We theoretically investigated efficient broadband light coupling between dielectric and hybrid plasmonic waveguides using a compact plasmonic taper. This novel coupler achieved 70% coupling efficiency at 1.55 microm wavelengths.

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Area of Science:

  • Photonics
  • Nanophotonics
  • Waveguide technology

Background:

  • Efficient light coupling is crucial for integrated photonic circuits.
  • Hybrid plasmonic waveguides offer unique light confinement properties.
  • Dielectric waveguides are standard components in optical systems.

Purpose of the Study:

  • To theoretically investigate efficient broadband light coupling between dielectric and hybrid plasmonic waveguides.
  • To design and analyze a compact plasmonic coupler for this purpose.

Main Methods:

  • Theoretical investigation of light coupling.
  • Utilizing a plasmonic linear taper as a coupler.
  • Analysis of coupling efficiency at telecommunication wavelengths.

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Last Updated: Jun 11, 2026

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Main Results:

  • A compact plasmonic linear taper coupler was designed.
  • Broadband coupling was achieved with the taper.
  • A coupling efficiency of 70% (1.5 dB) was obtained at 1.55 microm.
  • The taper length was only 0.4 microm.

Conclusions:

  • The plasmonic linear taper is an effective device for efficient broadband coupling.
  • This method enables seamless integration of dielectric and hybrid plasmonic waveguides.
  • The compact nature of the coupler is advantageous for miniaturized photonic devices.