title: Fields of a radially polarized Gaussian laser beam beyond the paraxial approximation.
abstract: Analytic expressions for the fields of a tightly focused radially polarized Gaussian laser beam are derived, accurate to epsilon5, where epsilon is the associated diffraction angle. The fields satisfy Maxwell's equations, and the calculated beam power based on them is significantly different from that of the paraxial-approximation fields.
authors.affiliation: Physics Department, American Univeristy of Sharjah, Sharjah, United Arab Emirates. ysalamin@aus.edu
authors.forename: Yousef I
authors.initials: YI
authors.lastname: Salamin