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Updated: Jul 29, 2025

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Spatially Resolved Nonlinear Plasmonics.

Johannes Schust¹, Florian Mangold¹, Florian Sterl¹

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

|May 24, 2023

Summary

This summary is machine-generated.

We developed nonlinear spatially resolved spectroscopy (NSRS) to image plasmonic nanoantenna behavior. This technique reveals how nanoantennas deform and enhance light emission under intense laser excitation.

Keywords:

Imaging Nanoantennas Plasmonics Self-enhancement Third Harmonic Generation

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Last Updated: Jul 29, 2025

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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Published on: January 3, 2016

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Area of Science:

Nonlinear optics
Plasmonics
Nanophotonics

Background:

Nonlinear optical plasmonics uses nonlinear spectroscopy to study plasmonic nanoantenna emission.
Understanding nanoantenna emission dynamics is crucial for advanced optical applications.

Purpose of the Study:

Introduce nonlinear spatially resolved spectroscopy (NSRS) for detailed nanoantenna analysis.
Image k-space and spatially resolve third-harmonic generation (THG) signals from gold nanoantennas.
Investigate individual antenna emission within arrays using wide-field illumination.

Main Methods:

Utilized nonlinear spatially resolved spectroscopy (NSRS) with theoretical simulations.
Wide-field illumination of nanoantenna arrays.
Post-experiment structural analysis using Scanning Electron Microscopy (SEM).

Main Results:

Successfully imaged various oscillation modes and spatial emission hotspots within nanostructures.
Observed an individual destruction threshold upon increasing femtosecond excitation intensity.
Identified exceptionally bright antennas that deformed into a peanut-like shape, correlating with nonlinear self-enhancement.

Conclusions:

NSRS enables detailed investigation of nanoantenna nonlinear optical properties.
Demonstrated a nonlinear self-enhancement process in nanoantennas under critical laser excitation.
The technique allows correlation of optical emission with structural changes in nanoantennas.