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Related Experiment Video

Updated: Mar 23, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Nonlinear Plasmonic Sensing.

Martin Mesch1, Bernd Metzger1, Mario Hentschel1

  • 14th Physics Institute and Research Center SCoPE, University of Stuttgart , Pfaffenwaldring 57, 70569 Stuttgart, Germany.

Nano Letters
|April 7, 2016
PubMed
Summary
This summary is machine-generated.

We developed nonlinear plasmonic sensing using third harmonic generation, achieving higher sensitivity for detecting refractive index changes than traditional linear methods. This advancement offers a more precise approach to plasmonic sensing applications.

Keywords:
Nanoopticsnonlinear opticsplasmonicsrefractive index sensing

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Area of Science:

  • Nanotechnology
  • Photonics
  • Sensing technologies

Background:

  • Localized surface plasmon resonance (LSPR) sensing is a common technique.
  • Linear LSPR sensing has limitations in sensitivity to refractive index changes.

Purpose of the Study:

  • To introduce and investigate nonlinear plasmonic sensing using third harmonic generation (THG).
  • To compare the sensitivity of nonlinear plasmonic sensing with linear LSPR sensing.

Main Methods:

  • Fabrication and characterization of plasmonic nanoantenna arrays.
  • Performing linear and third harmonic spectroscopy.
  • Measuring sensitivity to local refractive index changes.

Main Results:

  • Nonlinear plasmonic sensing demonstrates significantly higher sensitivity to refractive index changes compared to linear LSPR sensing.
  • Detection of refractive index changes as small as 10(-3) is achievable.
  • Relative signal changes are approximately seven times higher in nonlinear sensing.

Conclusions:

  • Nonlinear plasmonic sensing based on THG offers enhanced sensitivity for refractive index detection.
  • This nonlinear approach provides a more precise alternative to conventional linear plasmonic sensing techniques.