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Thermo-optic control of dielectric-loaded plasmonic waveguide components.

Jacek Gosciniak1, Sergey I Bozhevolnyi, Thomas B Andersen

  • 1Institute of Sensors, Signals and Electrotechnics (SENSE), University of Southern Denmark, Niels Bohrs Allé 1, Odense M, Denmark.

Optics Express
|February 23, 2010
PubMed
Summary

Researchers developed compact plasmonic waveguide components for telecom wavelengths. These devices, including Mach-Zehnder interferometers and ring resonators, show strong output modulation and efficient signal rerouting.

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Area of Science:

  • Photonics and Nanophotonics
  • Integrated Optics
  • Plasmonics

Background:

  • Plasmonic waveguides offer miniaturization potential for optical components.
  • Thermo-optic control provides a viable method for active tuning of photonic devices.

Purpose of the Study:

  • To develop and demonstrate compact, fiber-coupled dielectric-loaded plasmonic waveguide components.
  • To investigate thermo-optic control of these components at telecom wavelengths.
  • To evaluate the performance of Mach-Zehnder interferometers (MZIs), waveguide-ring resonators (WRRs), and directional couplers (DCs).

Main Methods:

  • Fabrication of fiber-coupled dielectric-loaded plasmonic waveguides.
  • Integration of gold stripes for electrical heating and thermo-optic effect.

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  • Characterization of MZI, WRR, and DC components at telecom wavelengths.

    • Main Results:

    • Demonstrated compact components with lengths < 100 micrometers.
    • Achieved strong output modulation (> 20%) in MZI and WRR devices.
    • Obtained efficient signal rerouting (approx. 30%) with DC switches.

    Conclusions:

    • Preliminary results show the feasibility of thermo-optic control for compact plasmonic waveguide devices.
    • Developed components hold promise for integrated photonic applications requiring active tuning.
    • The demonstrated performance metrics pave the way for further development in miniaturized optical switching and modulation.