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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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Published on: January 3, 2016

Achieving sub-diffraction spatial resolution using combined Fourier transform spectroscopy and nonlinear optical

Megan A Steves¹, Kenneth L Knappenberger¹

¹Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA.

The Journal of Chemical Physics

|January 16, 2022

Summary

This summary is machine-generated.

Fourier transform nonlinear optical microscopy achieves sub-diffraction imaging of single gold nanorods. This technique reveals detailed optical properties and spatial arrangements with high resolution, surpassing traditional limits.

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Area of Science:

Nanotechnology
Optical Microscopy
Spectroscopy

Background:

Gold nanorods exhibit unique plasmonic properties.
Characterizing individual nanorods is crucial for understanding their behavior.
Conventional microscopy has resolution limits.

Purpose of the Study:

To develop a sub-diffraction imaging technique for single gold nanorods.
To perform nonlinear spectroscopy on individual nanorods.
To enable hyperspectral imaging of plasmon resonances.

Main Methods:

Fourier transform nonlinear optical microscopy.
Time-delayed, phase-locked laser pulses.
Interferogram analysis for resonant response retrieval.

Main Results:

Achieved sub-diffraction spatial resolution, distinguishing nanorods tens of nanometers apart.
Enabled wide-field hyperspectral imaging of longitudinal plasmon resonances.
Correlated microscopy positions and energies with electron microscopy data.

Conclusions:

Fourier transform nonlinear optical microscopy provides super-resolution imaging of gold nanorods.
The technique accurately characterizes nanorod optical properties and spatial distribution.
This method advances the study of nanoscale plasmonic systems.