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Diffusion de second harmonique par les nanoparticules métalliques à symétrie sphérique

Abstract : This work is devoted to the study of the second harmonic scattering from spherical metallicnanoparticles. The optical properties of noble metal nanoparticles are known to be dominated bythe localized surface plasmon resonances which increase the second harmonic intensity. From afundamental point of view, the octupolar emission mode is revealed for the first time bycomparison between experiments and theory. The origin of the second harmonic generation(SHG) in metallic nanoparticles is discussed showing that bulk contributions are needed. It wasshown that Fano profiles can be observed in a very simple configuration. Practical applicationsare also addressed demonstrating that the properties of SHG increase the plasmonic sensorperformances. The second harmonic generation form single gold nanoparticles embedded in ahomogeneous medium is also reported for the first time paving the way toward a betterunderstanding of the morphology impact on the nonlinear response of metallic nanoparticles.
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https://tel.archives-ouvertes.fr/tel-00750115
Contributor : Jeremy Butet <>
Submitted on : Friday, November 9, 2012 - 9:12:42 AM
Last modification on : Thursday, October 15, 2020 - 9:00:22 AM
Long-term archiving on: : Sunday, February 10, 2013 - 3:39:38 AM

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  • HAL Id : tel-00750115, version 1

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Jérémy Butet. Diffusion de second harmonique par les nanoparticules métalliques à symétrie sphérique. Autre [cond-mat.other]. Université Claude Bernard - Lyon I, 2012. Français. ⟨NNT : 2012LYO10115⟩. ⟨tel-00750115⟩

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