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Harmonic Nanoparticles for Regenerative Research
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Sensing with multipolar second harmonic generation from spherical metallic nanoparticles.

Jérémy Butet1, Isabelle Russier-Antoine, Christian Jonin

  • 1Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM), UMR CNRS 5579, Université Claude Bernard Lyon 1, 43 Boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France.

Nano Letters
|March 2, 2012
PubMed
Summary
This summary is machine-generated.

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Nonlinear optical sensing using multipolar surface plasmon resonances offers higher sensitivity than linear optical sensing. This advancement improves plasmonic sensors for detecting refractive index changes near nanoparticles.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Linear optical sensing faces limitations in sensitivity for detecting subtle environmental changes.
  • Surface plasmon resonances (SPRs) are crucial for plasmonic sensing applications.
  • Nonlinear optical phenomena offer potential for enhanced sensing capabilities.

Purpose of the Study:

  • To investigate and compare the sensitivity of nonlinear optical sensing using multipolar SPRs against linear optical sensing.
  • To evaluate the performance of plasmonic sensors based on multipolar second harmonic generation (SHG).

Main Methods:

  • Utilizing Mie theory and its extension to describe multipolar SHG from silver nanoparticles.
  • Calculating the standard figure of merit for plasmonic sensors.

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  • Comparing sensor performance in the nonlinear and linear optical regimes.

    • Main Results:

    • Sensing in the nonlinear optical regime with multipolar SPRs demonstrates superior sensitivity.
    • Multipolar SHG from silver nanoparticles is effectively described by Mie theory.
    • The calculated figure of merit confirms enhanced sensitivity compared to linear counterparts.

    Conclusions:

    • Nonlinear optical sensing with multipolar SPRs provides a significant improvement in sensitivity for plasmonic sensors.
    • This approach enhances the detection of optical refractive index changes in nanoparticle vicinity.
    • The findings pave the way for more sensitive and advanced optical sensing technologies.