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Related Experiment Video

Updated: May 12, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Augmenting second harmonic generation using Fano resonances in plasmonic systems.

Krishnan Thyagarajan1, Jérémy Butet, Olivier J F Martin

  • 1Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland.

Nano Letters
|March 29, 2013
PubMed
Summary

Researchers enhanced second harmonic generation using Fano resonances in silver heptamers. This plasmonic structure localizes light at the fundamental wavelength and enhances nonlinear optical signals.

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Area of Science:

  • Plasmonics
  • Nonlinear Optics
  • Metamaterials

Background:

  • Plasmonic nanostructures offer unique light-matter interactions.
  • Fano resonances provide sharp spectral features for enhanced optical phenomena.
  • Second harmonic generation (SHG) is a key nonlinear optical process.

Purpose of the Study:

  • To demonstrate significant augmentation of second harmonic generation (SHG) in plasmonic heptamers.
  • To engineer heptamer geometry for simultaneous Fano resonance at the fundamental wavelength and a scattering peak at the second harmonic wavelength.
  • To explore the potential of Fano resonant structures in nonlinear and quantum optics.

Main Methods:

  • Theoretical modeling of plasmonic heptamers.
  • Experimental fabrication and characterization of silver heptamers.

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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  • Optical measurements of linear and nonlinear responses.

    • Main Results:

    • Achieved significant augmentation of SHG using Fano resonances in silver heptamers.
    • Engineered geometry to create a Fano resonance at the fundamental wavelength, enhancing field localization.
    • Observed a higher-order scattering peak at the second harmonic wavelength.

    Conclusions:

    • Fano resonant structures are versatile for engineering optical responses in linear and nonlinear regimes.
    • Demonstrated a pathway for enhanced nonlinear optical phenomena using plasmonic metamaterials.
    • Highlighted the potential of dark modes in nonlinear and quantum optics.