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Microscopie optique de champ proche dans le domaine terahertz

Abstract : During this PhD thesis, two original microscopes combining an innovative contrast related to THz frequencies (from 0,1 to 10 THz) with the super-resolvent techniques of optical near field microscopy were built.
Initially, we developed an instrument whose originality lies in the illumination method: a local IR/THz source generated in situ by optical rectification. Several metal and dielectric samples were imaged, illustrating the sub-wavelength resolution. Parallely, the mechanisms of image-formation in the microscope were investigated with a theoretical study.
Subsequently, a modified version of the optical near field microscope working in an apertureless mode was designed and constructed. This configuration made it possible to reach a sub-micron resolution in the THz field, thanks to the addition of a metal tip serving as a scatterer for evanescent waves.
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https://tel.archives-ouvertes.fr/tel-00087889
Contributor : Romain Lecaque <>
Submitted on : Thursday, July 27, 2006 - 1:32:16 PM
Last modification on : Thursday, December 10, 2020 - 10:57:21 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 12:27:41 AM

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  • HAL Id : tel-00087889, version 1

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Romain Lecaque. Microscopie optique de champ proche dans le domaine terahertz. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00087889⟩

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