Here we present one of the first complete treatments of the ionization of a real atom by realistic laser pulses of arbitrary length and intensity. A large basis set of hydrogenic bound and discretized continuum states is employed in a close-coupling solution of the full time-dependent Schrödinger equation to give converged results for the resulting ionization probability for H(1s). Various laser frequencies, corresponding to one- and three-photon ionization and the 1s-2p resonance, as well as laser intensities in the multi-photon, tunnelling and over-the-barrier ionization regimes are examined. It is seen that the ionization probability of H(1s) following a laser pulse is a very complicated function of frequency, phase, pulse shape, pulse length and intensity.
BT - Journal of Physics B: Atomic, Molecular and Optical Physics DA - 2002-04 DO - 10.1088/0953-4075/33/10/310 N2 -Here we present one of the first complete treatments of the ionization of a real atom by realistic laser pulses of arbitrary length and intensity. A large basis set of hydrogenic bound and discretized continuum states is employed in a close-coupling solution of the full time-dependent Schrödinger equation to give converged results for the resulting ionization probability for H(1s). Various laser frequencies, corresponding to one- and three-photon ionization and the 1s-2p resonance, as well as laser intensities in the multi-photon, tunnelling and over-the-barrier ionization regimes are examined. It is seen that the ionization probability of H(1s) following a laser pulse is a very complicated function of frequency, phase, pulse shape, pulse length and intensity.
PY - 2000 EP - 1967 T2 - Journal of Physics B: Atomic, Molecular and Optical Physics TI - Ionization of H(1s) by laser pulses: a close-coupling study VL - 33 SN - 0953-4075 ER -