title: Derivation of the paraxial equation for extraordinary waves in uniaxial media.
abstract: A relatively simple derivation of the paraxial equation for extraordinary electromagnetic waves in uniaxial media is presented. The propagation of the waves is described with both Abraham's and Minskowski's definitions of the electromagnetic momentum. A Gaussian beam is worked out to illustrate the sidewalk effect of extraordinary rays.
authors.affiliation: Instituto de Física, Universidad Nacional Autónoma de México, Apdo. Postal 20-364, México D.F. 01000, México. hacyan@fisica.unam.mx
authors.forename: Shahen
authors.initials: S
authors.lastname: Hacyan