Mapping of angular and spatial optical intensity distributions issuing from nanostructured slits, milled into subwavelength metallic layers

We present the results of experiments in support of the composite diffracted evanescent wave (CDEW) model that describes the response of subwavelength planar structures to illumination by polarised plane-wave optical excitation. These experiments consist of four types of data: (1) angular distributi...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 19; no. 1; pp. 102 - 108
Main Authors Gay, G, Lesegno, B Viaris de, Mathevet, R, Lezec, H J, Weiner, J
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2005
Subjects
Angular distribution
Cold atoms
Evanescent waves
Far fields
Grooves
Physics
Planar structures
Slits
Transmission efficiency
Wave diffraction
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Summary:We present the results of experiments in support of the composite diffracted evanescent wave (CDEW) model that describes the response of subwavelength planar structures to illumination by polarised plane-wave optical excitation. These experiments consist of four types of data: (1) angular distribution of the transmitted light as a function of quarterwave groove displacement, (2) efficiency of transmission through a subwavelength slit as a function of slit-groove distance, (3) relative phase measurements by far-field interference patterns of transmitted light as a function of slit-groove displacement, and (4) far-field spatial profile of the optical field intensity issuing from subwavelength slits flanked by periodic grooves and fabricated on a thin metallic layer. These types of structure are of interest for the manipulation of cold atoms by optical potentials near surfaces.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/19/1/018