Effects of laser polarization on jet emission of fast electrons in femtosecond-laser plasmas - art. no. 225001

Effects of laser polarization on fast electron emission are studied from an aluminum target irradiated by ultrashort laser pulses at 2 x 10(16) W/cm(2 ). Jet emission of outgoing fast electrons collimated in the polarization d irection is observed for s-polarized laser irradiation, whereas for p-polar ized irradiation highly directional emission of outgoing fast electrons is found in the direction close to the normal of the target. The behavior of i ngoing fast electrons into the target for s- and p-polarized irradiation is also investigated by observing x-ray bremsstrahlung radiation at the backs ide of the target.