Wavefront Engineering Research Group
Universitat de Barcelona

E-mail: optics (at) ub.edu

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Title Structure of the transverse profile of Gaussian-model non-paraxial electromagnetic beams
Authors Martinez-Herrero R, Mejias PM, Bosch S, Carnicer A
Journal JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS Volume: 8 Issue: 6 Pages: 524-530
Year 2006
DOI http://dx.doi.org/10.1088/1464-4258/8/6/006
Abstract Starting from the (inexact) Gaussian beam model, and on the basis of a plane-wave spectrum representation of non-paraxial electromagnetic fields, three free-propagating exact solutions of the Maxwell equations are investigated. The transverse part of one of these solutions is shown to closely resemble both the beam profile irradiance and the polarization distribution of a typical Gaussian beam. A limit has also been established for the validity of the paraxial regime, particularly for focused beams whose size at the waist approaches the light wavelength.