title: Dynamics of dark hollow Gaussian laser pulses in relativistic plasma.
abstract: Optical beams with null central intensity have potential applications in the field of atom optics. The spatial and temporal evolution of a central shadow dark hollow Gaussian (DHG) relativistic laser pulse propagating in a plasma is studied in this article for first principles. A nonlinear Schrodinger-type equation is obtained for the beam spot profile and then solved numerically to investigate the pulse propagation characteristics. As series of numerical simulations are employed to trace the profile of the focused and compressed DHG laser pulse as it propagates through the plasma. The theoretical and simulation results predict that higher-order DHG pulses show smaller divergence as they propagate and, thus, lead to enhanced energy transport.
authors.affiliation: Institute of Physics, University of Pecs, 7621 Pecs, Hungary. a_physics2001@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Sharma
authors.forename: S
authors.initials: S
authors.lastname: Misra
authors.forename: S K
authors.initials: SK
authors.lastname: Mishra
authors.forename: I
authors.initials: I
authors.lastname: Kourakis