Authors
Hong Shen, Ngoc Nguyen, David Gachet, Vincent Maillard, Timothée Toury, Sophie Brasselet,
Title
Nanoscale optical properties of metal nanoparticles probed by Second Harmonic Generation microscopy
In
Optics Express
Volume
21
Issue
10
Pages
12318–12326
Publisher
OSA
Year
2013
Publisher's URL
http://dx.doi.org/10.1364/OE.21.012318
Indexed by
Abstract
We report spatial and vectorial imaging of local field confinement properties in metal nanoparticles with branched shapes, using Second Harmonic Generation (SHG) microscopy. Taking advantage of the coherent nature of this nonlinear process, the technique provides a direct evidence of the coupling between the excitation polarization and both localization and polarization specificities of local fields at the sub-diffraction scale. These combined features, which are governed by the nanoparticles’ symmetry, are not accessible using other contrasts such as linear optical techniques or two-photon luminescence.
Affiliations
Offprint