Nanotech 2004 Vol. 3
Nanotech 2004 Vol. 3
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3

Nano Photonics, Optoelectronics and Imaging Chapter 1

Local Optical Field in the Neighborhood of Structured Surfaces: Phase Singularities and Talbot Effect

Authors: B. Levine, M. Caumont, C. Amien, B. Chaudret, B. Dwir and W.S. Bacsa

Affilation: LPST Université Paul Sabatier, France

Pages: 5 - 7

Keywords: local optical field, structured surfaces, middle field, Talbot effect, phase singularities

Abstract:
We have probed the local optical field in the vicinity of structured surfaces to observe optical coherence effects. We have used a sub -wavelength sized optical fiber probe to map the local field of microgratings and nanometer sized gold particles. While probing the middle field region, the ratio of the aperture size to the object-probe distance is smaller (a/h =1) than in the nearfield region (a/h=10). In the middle field one probes mostly the transverse field component and probe induced effects are reduced. We have observed self-imaging (Talbot effect) of the micrograting structure in the direction of the incident beam and apparent phase singularities from the deposited gold particles in the direction of the reflected beam.


ISBN: 0-9728422-9-2
Pages: 561
Hardcopy: $79.95

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