Eur. Phys. J. D (2013) 67: 90
https://doi.org/10.1140/epjd/e2013-30658-8

Regular Article

Coulomb-corrected propagation equation of femtosecond laser in field-ionized medium

Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, P.R. China

^a e-mail: sxfll@emails.bjut.edu.cn
^b e-mail: sbliu@bjut.edu.cn

Received: 28 October 2012
Received in final form: 18 February 2013
Published online: 30 April 2013

Abstract

In most strong-field atomic processes, the role of Coulomb potential is dismissively ignored because of the application of strong field approximation reasonably. By introducing it into the propagation equation of laser pulse in the field-ionizing media, we demonstrate that the noteworthy Coulomb effects have the ionized electronic density decreased due to the attraction by the nuclear cores and lead a new energy dissipation mechanism to rise due to the collision of the accelerated electrons by laser field with the Coulomb potential of their parent ions, i.e., the bremsstrahlung process.