title: Application of Hertz vector diffraction theory to the diffraction of focused Gaussian beams and calculations of focal parameters.
abstract: Hertz vector diffraction theory is applied to a focused TEM00 Gaussian light field passing through a circular aperture. The resulting theoretical vector field model reproduces plane-wave diffractive behavior for severely clipped beams, expected Gaussian beam behavior for unperturbed focused Gaussian beams as well as unique diffracted-Gaussian behavior between the two regimes. The maximum intensity obtainable and the width of the beam in the focal plane are investigated as a function of the clipping ratio between the aperture radius and the beam width in the aperture plane.
authors.affiliation: Physics Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA. ggillen@calpoly.edu
authors.forename: Glen D
authors.initials: GD
authors.lastname: Gillen
authors.forename: Kendra
authors.initials: K
authors.lastname: Baughman
authors.forename: Shekhar
authors.initials: S
authors.lastname: Guha