Transition from out-of-plane to in-plane contribution for the optical second harmonic generation response from a silver metallic nanoparticle film

The time evolution of the second harmonic generation (SHG) intensity during the formation of a silver spherical nanoparticle film at the water/1,2-dichloroethane interface is reported. The 5 nm diameter silver nanoparticles were initially dispersed in the water phase and their precipitation at the i...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2011-06, Vol.23 (25), p.255301-6
Main Authors: El Harfouch, Yara, Benichou, Emmanuel, Pu, Lin, Bachelier, Guillaume, Russier-Antoine, Isabelle, Jonin, Christian, Brevet, Pierre-François
Format: Article
Language:English
Subjects:
Chemical synthesis methods
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Deposition
Evolution
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Materials science
Methods of nanofabrication
Nanocrystals and nanoparticles
Nanoparticles
Nanostructure
Nonlinear optics
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Optics
Physics
Precipitation
Second harmonic generation
Silver
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Summary:The time evolution of the second harmonic generation (SHG) intensity during the formation of a silver spherical nanoparticle film at the water/1,2-dichloroethane interface is reported. The 5 nm diameter silver nanoparticles were initially dispersed in the water phase and their precipitation at the interface was triggered with the addition of sodium chloride. The time evolution of the SHG intensity exhibited two distinct regimes. First, an intensity increase was observed during the film formation with the deposition and the reorganization of the nanoparticles at the interface. Then, a slow decrease of the intensity due to rearrangements within the film was observed. Polarization-resolved experiments were also performed and showed that the initial dominant out-of-plane contribution of the quadratic nonlinearity underwent a reorientational change towards a dominant in-plane contribution associated with a smoother but still discontinuous metallic film.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/23/25/255301