Coulomb-Volkov approximation for near-threshold ionization by short laser pulses

D. G. ARBÓ; J. E. MIRAGLIA; M. S. GRAVIELLE; K. SCHIESSL; E. PERSSON; J. BURGDÖRFER

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

Americal Physical Society

Lugar: New York; Año: 2008 vol. 77 p. 13401 - 13401

1050-2947

The formation of near-threshold structures in the angle-resolved photoelectron spectrum, the cusp in the transverse electron momentum distribution, and the forward-backward asymmetry is influenced by the residual Coulomb potential of the remaining atomic core acting on the electron detached by strong short-laser pulses. We show that an improvement beyond the strong-field approximation—the Coulomb-Volkov distorted wave approximation—is capable to reproduce these features found in the exact solution of the time-dependent Schrödinger equation in the multiphoton regime and the transition from the multiphoton to the tunneling regime.