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International Journal of Optics
Volume 2012 (2012), Article ID 152937, 7 pages
http://dx.doi.org/10.1155/2012/152937
Research Article

Surface Plasmon Singularities

1Departamento de Óptica, Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE), Apdo. Postal 51 y 216, Tonantzintla, PUE, Mexico
2Facultad de Ingeniería, Benemérita Universidad Autónoma de Puebla (BUAP), Publa, PUE, Mexico
3Universidad Juárez Autónoma de Tabasco, (UJAT), Cunduacán, Tab, Mexico

Received 5 April 2012; Revised 12 June 2012; Accepted 13 June 2012

Academic Editor: Zhaolin Lu

Copyright © 2012 Gabriel Martínez-Niconoff et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

With the purpose to compare the physical features of the electromagnetic field, we describe the synthesis of optical singularities propagating in the free space and on a metal surface. In both cases the electromagnetic field has a slit-shaped curve as a boundary condition, and the singularities correspond to a shock wave that is a consequence of the curvature of the slit curve. As prototypes, we generate singularities that correspond to fold and cusped regions. We show that singularities in free space may generate bifurcation effects while plasmon fields do not generate these kinds of effects. Experimental results for free-space propagation are presented and for surface plasmon fields, computer simulations are shown.