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Directive antenna nanocoupler to plasmonic gap waveguides.

F Obelleiro1, J M Taboada, D M Solís

  • 1E. E. Telecomunicación, Universidade de Vigo, Vigo, Spain.

Optics Letters
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

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Researchers designed a directive nanoantenna for optical nanocouplers, significantly boosting coupling efficiency (CE) by tenfold compared to nondirective designs for nanophotonic systems.

Area of Science:

  • Photonics
  • Plasmonics
  • Nanotechnology

Background:

  • Optical nanocouplers are crucial for integrating fiber and plasmonic nanowaveguides in nanophotonic systems.
  • Existing nanocouplers often lack efficiency due to size mismatches and non-directive designs.

Purpose of the Study:

  • To design an efficient optical nanocoupler for visible light (λ0=0.65 μm).
  • To maximize coupling efficiency (CE) by optimizing a directive nanoantenna and its matching element.

Main Methods:

  • Design and optimization of a directive nanoantenna.
  • Utilizing localized plasmonic resonance for high-frequency operation.
  • Comparative analysis against nondirective antenna nanocouplers.

Main Results:

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  • Achieved high coupling efficiency with a compact nanoantenna.
  • The directive nanoantenna design improved CE by a factor of 10.
  • Demonstrated efficient coupling despite the small antenna size relative to the fiber spot size.

Conclusions:

  • Directive nanoantennas are effective for enhancing optical nanocoupler performance.
  • Optimized nanocouplers offer a significant improvement for nanophotonic applications.
  • This design overcomes limitations of previous nondirective approaches.