title: Time evolution of the diffraction pattern of an ultrashort laser pulse.
abstract: An analytical expression for the time evolution of the diffraction pattern of an ultrashort laser pulse passing through a circular aperture is obtained in the Fresnel regime. The diffraction is not constant in time as the pulse travels through the aperture. This may have implications in experiments involving fast dynamics. Examples of the evolution of the diffraction pattern are given.
authors.forename: M
authors.initials: M
authors.lastname: Lefrancois
authors.forename: S
authors.initials: S
authors.lastname: Pereira