Spectroscopic study of resonant dielectric structures in near-field

Issue		Eur. Phys. J. Appl. Phys. Volume 5, Number 3, March 1999


Page(s)		277 - 281
DOI		10.1051/epjap:1999140

DOI: 10.1051/epjap:1999140

Eur. Phys. J. AP 5, 277-281

Spectroscopic study of resonant dielectric structures in near-field

S. Davy - D. Barchiesi - M. Spajer - D. Courjon

Laboratoire d'Optique P.M. Duffieux, Université de Franche-Comté, Institut des Microtechniques, 25030 Besançon Cedex, France
dominique.barchiesi@univ-fcomte.fr

Received: 2 July 1998 / Revised: 29 September 1998 / Accepted: 29 October 1998

Abstract
Gratings can be considered as resonant structures in near-field. The enhancement of the intensity recorded by Scanning Near-Field Optical Microscopes (SNOM) is due to interferences in relation with the ratio of the wavelength to the product of the optical index by the period of the grating. We discuss the effect of this ratio (in the range 0.9, 1.1) on the intensity patterns. The influence of the polarization on near-field data is analyzed in both theoretical computations and experimental result.

PACS
07.79.Fc Near-field scanning optical microscopes

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