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Nanosources exaltées pour la spectroscopie non-linéaire en champ proche optique

Abstract : The yield of sub-microscopic non-linear optical processes are very low. Therefore, intensive researches are done to study the electromagnetic field confinement by metallic structures on sub-wavelength areas.
This describe relates the optical properties of granular metallic films on nanometer scale. These samples show linear local field enhancements in nanometer-sized regions due to surface plasmon resonances (SPR).
In order to study these samples, aperture near-field optical microscopy (SNOM) has been chosen. Our results display high local field enhancements in sub-wavelength areas. These fields depend on both wavelength and polarization. When SPR are not excited, only scattering occurs. When increasing the wavelength, enhancements are observed together with scattering. Finally, these two regimes are statistically analysed with the autocorrelation function.
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Contributor : Julien Laverdant <>
Submitted on : Tuesday, November 27, 2007 - 9:27:45 AM
Last modification on : Friday, January 10, 2020 - 3:42:18 PM
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  • HAL Id : tel-00192189, version 1



Julien Laverdant. Nanosources exaltées pour la spectroscopie non-linéaire en champ proche optique. Physique [physics]. Université de Versailles-Saint Quentin en Yvelines, 2007. Français. ⟨tel-00192189⟩



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