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Start Over Author "Benichou E" Topic metal nanoparticles
2 results on '"Benichou E"'

1. Three-dimensional mapping of single gold nanoparticles embedded in a homogeneous transparent matrix using optical second-harmonic generation.

Author

Butet J, Bachelier G, Duboisset J, Bertorelle F, Russier-Antoine I, Jonin C, Benichou E, and Brevet PF

Subjects
Algorithms, Lasers, Models, Statistical, Nanostructures chemistry, Photons, Polymers chemistry, Surface Plasmon Resonance, Gold chemistry, Metal Nanoparticles chemistry, Nanotechnology methods, Optics and Photonics
Abstract

We report the three-dimensional mapping of 150 nm gold metallic nanoparticles dispersed in a homogeneous transparent polyacrylamide matrix using second-harmonic generation. We demonstrate that the position of single nanoparticles can be well defined using only one incident fundamental beam and the harmonic photon detection performed at right angle. The fundamental laser beam properties are determined using its spatial autocorrelation function and used to prove that single nanoparticles are observed. Polarization resolved measurements are also performed allowing for a clear separation of the second-harmonic response of the single gold metallic nanoparticles from that of aggregates of such nanoparticles.

Published
2010
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2. Multipolar Second Harmonic Generation from Metallic Nanoparticles.

Author

Butet, J., Bachelier, G., Russier-Antoine, I., Jonin, Ch., Benichou, E., and Brevet, P. F.

Subjects
METAL nanoparticles, SECOND harmonic generation, PARTICLE size determination, NONLINEAR optics, RAYLEIGH scattering, SURFACES (Technology)
Abstract

A general framework is given to describe the multipolar Second Harmonic (SH) response from small metallic particles the size of which ranges between a few ten of nanometers and 150 nm. A particular emphasis is given to the input polarization dependence of the SH intensity and the separation of its different mechanisms. The nonlinear polarization is here reduced as a surface polarization term only, the latter stemming from the local breaking of the centrosymmetry at the surface of the particle. The results are applied to the experimental case of the incoherent scattering of the second harmonic light, i.e. hyper Rayleigh scattering, for non-interacting metallic particles dispersed in solution. [ABSTRACT FROM AUTHOR]

Published
2015
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