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Plasmonic grating as a nonlinear converter-coupler.

Nahid Talebi1, Mahmoud Shahabadi, Worawut Khunsin

  • 1Photonics Research Laboratory, Center of Excellence for Applied Electromagnetic Systems, School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran. n.talebi@ece.ut.ac.ir

Optics Express
|January 26, 2012
PubMed
Summary
This summary is machine-generated.

This study presents a novel metallic particle grating on an optical waveguide for efficient wavelength conversion. The plasmonic resonances enhance light conversion, enabling a new device for optical signal processing.

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Area of Science:

  • Photonics and Nanophotonics
  • Plasmonics
  • Nonlinear Optics

Background:

  • Optical waveguides are crucial for light manipulation.
  • Wavelength conversion is essential for optical signal processing.
  • Plasmonic resonances offer pathways for enhanced light-matter interactions.

Purpose of the Study:

  • To introduce a novel wavelength converter utilizing a metallic finite 2D particle grating on an optical waveguide.
  • To investigate the plasmonic resonances and near-field enhancement for high conversion efficiency.
  • To ensure phase-matching for the generated third harmonic wave while preventing fundamental frequency coupling.

Main Methods:

  • Linear analysis using a full-wave transmission line method.
  • Nonlinear analysis using a three-dimensional finite-difference time-domain method.
  • Numerical investigation of the proposed structure's performance.

Main Results:

  • Demonstration of a wavelength converter with high conversion efficiency.
  • Utilized plasmonic resonances for near-field enhancement.
  • Achieved phase-matching for the third harmonic wave to a propagating mode.

Conclusions:

  • The metallic particle grating on an optical waveguide is an effective design for efficient wavelength conversion.
  • The proposed structure facilitates efficient nonlinear frequency generation.
  • This work contributes to advancements in optical signal processing and nanophotonic devices.