De l'autre côté du miroir : Etude de la transmission exaltée de la lumière par des ouvertures de taille sub-longueur d'onde creusées dans un métal

par Aloyse Degiron

Thèse de doctorat en Physique

Sous la direction de Thomas W. Ebbesen.

Soutenue en 2004

à Strasbourg 1 .

  • Titre traduit

    On the back side of the mirror : Study of the enhanced transmission of light through subwavelength apertures in metal films


  • Résumé

    The work described in this thesis covers diverse aspects of the optical transmission through subwavelength apertures. It was motivated by the discovery of the extraordinary transmission through subwavelength apertures in metal film where the enhancement is due to the coupling of light to surface plasmons. We showed that the extraordinary transmission in the sub-wavelength regime is a tunnelling phenomenon enhanced by surface plasmons, as predicted by theoretical investigations, and that the transmission is very sensitive to the dielectric constant of the metal. By studying a single aperture surrounded by periodic corrugations, we noticed that the shape of the wavefront can be tailored by a periodic milling of the output surface. In such a way, the beam with a small angular divergence can be created thereby surmounting the standard diffraction of small apertures. Furthermore it is shown that the transmission process can be separated into three separate independent steps: coupling in, transmission through the aperture and coupling out. Finally, we discovered that even isolated subwavelength apertures give rise to transmission peaks at certain wavelengths. This is due to the activation of localized surface plasmons on the rim of the aperture. This result challenges the understanding and theoretical description of the transmission of single holes.

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La version de soutenance existe sous forme papier

Informations

  • Détails : 113 p.
  • Notes : Publication autorisée par le jury
  • Annexes : Bibliogr. p. 109-113

Où se trouve cette thèse ?

  • Bibliothèque : Université de Strasbourg. Service commun de la documentation. Bibliothèque Danièle Huet-Weiller.
  • Disponible pour le PEB
  • Cote : Th.Strbg.Sc.2004;4579
Voir dans le Sudoc, catalogue collectif des bibliothèques de l'enseignement supérieur et de la recherche.