Above-threshold ionization at the few-cycle limit

Phys Rev Lett. 2003 Oct 24;91(17):173003. doi: 10.1103/PhysRevLett.91.173003. Epub 2003 Oct 23.

Abstract

Photoelectron spectra measured for rare-gas atoms ionized with intense few-cycle laser pulses are presented. Several aspects of the few-cycle regime are discussed. In particular, the persistence of the plateaulike structure of spectra for high electron energies is shown. In contrast, a resonancelike feature at similar electron energies is suppressed as compared with longer laser pulses. Differences in the behavior of different species and implications for the electron-ion scattering cross section are pointed out.