Volume 56, Number 4, November 2001
|Page(s)||517 - 522|
|Published online||01 December 2003|
Simultaneous observation of light localization and confinement in near-field optics
Laboratoire de Microstructures et
Microélectronique (CNRS) 196 Avenue H. Ravera, F-92225 Bagneux, France
2 Laboratoire de Physique de l'Université de Bourgogne, Optique Submicronique 9 avenue A. Savary, F-21078 Dijon, France
3 CEMES (CNRS), 29 rue J. Marvig, and LCAR (CNRS) 118 route de Narbonne, Toulouse, France
Accepted: 16 August 2001
We report on the observation, in direct space, of both light localization and confinement effects near lithographically designed structures. The sample is observed in the optical near-field zone with a Photon Scanning Tunneling Microscope (PSTM). Several patterns composed of a few periods of TiO2 dots, arranged as a hexagonal lattice, have been investigated. When the central dot of the pattern is removed, a phenomenon of light localization above the vacancy can be observed in the PSTM image. The occurrence of this phenomenon can be related to the variation of the electromagnetic local density of state.
PACS: 07.79.Fc – Near-field scanning optical microscopes / 78.67.-n – Optical properties of nanoscale materials and structures / 78.68.+m – Optical properties of surfaces
© EDP Sciences, 2001
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