Eur. Phys. J. D 30, 441-444 (2004)
https://doi.org/10.1140/epjd/e2004-00096-0

Evolution of photoelectron angular distributions in a train of identical, circularly polarized few-cycle laser pulses

¹ CCAST (World Laboratary), P.O. Box 8730, Beijing 100080, P.R. China
² Laboratory for High Intensity Optics, Shanghai Institute of Optical and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, P.R. China
³ Department of Physics, Shantou University, Shantou 515063, P.R. China

Corresponding author: ^a jtzhang@siom.ac.cn

Received: 18 November 2003
Revised: 26 February 2004
Published online: 10 August 2004

Abstract

Photoelectron angular distribution (PAD) of atoms irradiated by a train of identical, circularly polarized few-cycle laser pulses is studied in the frame of a nonperturbative scattering theory. Our study shows that the PADs vary with the kinetic energy of photoelectron, the carrier-envelope phase, and the pulse duration. We find that along with increasing of the kinetic energy of photoelectron or with decreasing of the pulse duration or the both, the original one maximum of PAD splits into two maxima; the newly produced two maxima evolve to the opposite pole of the symmetric axis, and finally incorporate as a new maximum located in the symmetric axis.