Volume 57, Number 2, January 2002
|Page(s)||191 - 197|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Near-field observation of evanescent light wave coupling in subwavelength optical waveguides
Laboratoire de Physique de l'Université de Bourgogne -
Optique Submicronique 9 avenue A. Savary, F-21078 Dijon, France
2 Laboratoire de Microstructures et Microélectronique (CNRS) 196 Avenue H. Ravera, F-92225 Bagneux, France
3 Centre d'Elaboration des Matériaux et d'Etudes Structurales (CNRS) 29 rue J. Marvig, F-31055 Toulouse, France
Accepted: 26 October 2001
We report the observation, in the range of visible frequencies, of the coupling of light into integrated waveguides of subwavelength cross-sections together with a subwavelength detection at the output of such guides. Coupling in is produced by controlling the focusing of a laser beam totally reflected at the surface of the sample. Several tens of micrometres long dielectric ridges have been efficiently excited with this technique. The phenomenon is observed in direct space by a Photon Scanning Tunneling Microscope which also allows to test the principle of detection in a subwavelength volume.
PACS: 42.79.Gn – Optical waveguides and couplers / 42.82.Et – Waveguides, couplers, and arrays / 07.79.Fc – Near-field scanning optical microscopes
© EDP Sciences, 2002
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