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Génération de second harmonique pour la nano-optique et la microscopie optique en champ proche

Abstract : This work enabled us to characterize some properties of second harmonic generation in near-field optics thanks to the numerical methods implemented during this period: perturbativ Rayleigh method (MPR) and Finite difference time domain method (FDTD). Initially, the sources of the optical second harmonic were clarified according to the various types of crystalline symmetries. Then, the step to adapt the two numerical methods (FDTD and MPR) to nonlinear optics was exposed precisely. Tests on the two numerical methods were carried out for two types of materials: centrosymmetric and noncentrosymmetric materials. Then, modelings of various experiments for the two types of materials were implemented: dot gratings, metallic tip used in apertureless near-field optical microscope... The main result of this work is the strong confinement of the second harmonic close to the source. The second harmonic generation at the apex of a metallic tip gives rise to a highly localized source.
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https://tel.archives-ouvertes.fr/tel-00008888
Contributor : Thierry Laroche <>
Submitted on : Tuesday, March 29, 2005 - 11:27:10 AM
Last modification on : Thursday, November 12, 2020 - 9:42:07 AM
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  • HAL Id : tel-00008888, version 1

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Thierry Laroche. Génération de second harmonique pour la nano-optique et la microscopie optique en champ proche. Physique [physics]. Université de Franche-Comté, 2004. Français. ⟨tel-00008888⟩

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