title: TM and TE electromagnetic beams in free space.
abstract: The existence of unguided TM and TE Gaussian beams is derived in a simple way from the wave equation for the vector potential, and the field configurations are discussed. We point out the possibility of a new type of free-electron laser.
authors.forename: L W
authors.initials: LW
authors.lastname: Davis
authors.forename: G
authors.initials: G
authors.lastname: Patsakos