title: Fields of a focused linearly polarized Gaussian beam: truncated series versus the complex-source-point spherical-wave representation.
abstract: Fields of a linearly polarized fundamental Gaussian beam are derived exactly using the propagation characteristics of a complex-source-point spherical wave diverging from the origin. Intensity distributions are calculated and compared with their counterparts in a truncated series. It is found that utility of the exact fields is limited by a discontinuity inherent in the vector potential from which they have been obtained.
authors.affiliation: Department of Physics, American University of Sharjah, Sharjah, United Arab Emirates. ysalamin@aus.edu
authors.forename: Yousef I
authors.initials: YI
authors.lastname: Salamin