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Updated: Jun 22, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Nonlinear light scattering from clusters and single particles.

Jerry I Dadap¹, Hilton B de Aguiar, Sylvie Roke

¹Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA.

The Journal of Chemical Physics

|June 11, 2009

Summary

This summary is machine-generated.

We used sum-frequency scattering to study colloidal dispersions. Large fluctuations in scattered light reveal particle clusters, enabling measurement of cluster size using dynamic nonlinear light scattering.

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Area of Science:

Colloid science
Nonlinear optics
Spectroscopy

Background:

Sum-frequency scattering (SFS) is a vibrational spectroscopy technique.
Studying colloidal dispersions involves understanding particle interactions and aggregation.
Light scattering phenomena provide insights into material structure and dynamics.

Purpose of the Study:

To investigate fluctuations in sum-frequency scattered photons from colloidal dispersions.
To identify the cause of large intensity fluctuations observed at small scattering angles.
To demonstrate a method for measuring the size of correlated particle clusters.

Main Methods:

Performed sum-frequency-scattering experiments on colloidal dispersions with varying concentrations.
Analyzed the angular dependence of the scattered signal.
Examined particle concentration dependence and surface vibrational spectra.
Utilized dynamic nonlinear light scattering principles.

Main Results:

Observed significant fluctuations in sum-frequency photon intensity at small scattering angles.
Attributed these fluctuations to scattering from particle clusters within the dispersion.
Established a correlation between scattering signal characteristics and particle clustering.

Conclusions:

Particle clusters are responsible for the observed intensity fluctuations in sum-frequency scattering.
Dynamic nonlinear light scattering is a viable technique for quantifying the size of these correlated particle clusters.
This method offers a new approach to characterizing colloidal system dynamics and aggregation.