title: Few-optical-cycle bessel-gauss pulsed beams in free space
abstract: We introduce a new family of nonseparable, pulselike and beamlike solutions of the wave equation in the paraxial approximation with pseudonondiffracting behavior. They are the pulsed versions of the Bessel-Gauss beams by Gori et al., and encompass as particular cases the diffraction-free Bessel-X pulses, isodiffracting pulses, and, in the many-cycle limit, Bessel and Gaussian beams. Unlike Bessel-X waves, these solutions carry finite energy but retain nondiffracting behavior over a finite propagation distance, and could be physically produced with mode-locked toroidal resonators.
authors.affiliation: Departamento de Fisica Aplicada, Escuela de Ingenieros de Minas, Universidad Politecnica de Madrid, Rios Rosas 21, E-28003 Madrid, Spain.
authors.initials: MA
authors.lastname: Porras
authors.initials: R
authors.lastname: Borghi
authors.initials: M
authors.lastname: Santarsiero