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Nano-antennes optiques pour l'inspection des structures photoniques

Abstract : The aim of this thesis is to elaborate efficient optical nanoantennas (NAs) as innovative tools for probing the electromagnetic optical field in the neighbourhood of the structures used in nano-optics (photnics crystals, plasmonic devices, etc). A NA considered here consists of a metal nanostructure positioned onto the apex of a conventional near-field fiber probe used in collection mode (Photon Scanning Tunneling Microscopy configuration). Such a nano-structure acts as a key connection between the electromagnetic field at the sample surface and the local probe, giving to the probe a specific sensitivity to the vectorial electromagnetic field. NAs will be designed to provide optical information still inaccessible with conventional near-field optical microscopy for responding to the present and future needs of the growing nano-optics community. In the first part, we propose a bowtie nano-aperture (BNA) is recently proposed as an alternative solution to bowtie nano-antenna for concentrating light to the nanoscale and we explain the fabrication of a BNA with specific size at the extremity of a polymer optical fiber. In the second part, we propose a near-field imaging concept for obtaining a complete experimental description of the structure of light in three dimensions around nano-devices. Our approach is based on a near-field microscope able to simultaneously and independently map the phase and amplitude distributions of two orthogonal electric-field components at the sample surface. In last section, we present a theoretical study of the bowtie nano-aperture in order to elucidate the spectral behavior and the origin of its resonance mode in the gap of a BNA.
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Submitted on : Friday, February 3, 2012 - 10:07:49 AM
Last modification on : Thursday, January 13, 2022 - 12:00:16 PM
Long-term archiving on: : Wednesday, December 14, 2016 - 3:54:55 AM


  • HAL Id : tel-00665899, version 1


Idriss Abdoulkader Ibrahim. Nano-antennes optiques pour l'inspection des structures photoniques. Optique / photonique. Université de Franche-Comté, 2010. Français. ⟨NNT : ⟩. ⟨tel-00665899⟩



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