Ionization of atomic hydrogen by an intense resonant laser pulse

Abstract

The ionization of atomic hydrogen by an intense laser field resonant with the transition ls-Spo is studied. The intensity of the field is strong enough to make the Rabi oscillations important. The theoretical treatment of this work is based on a modified form of the Coulomb-Volkov approximation. The decay to the continuum is accounted by coupling the initial and the excited resonant states to the continuum part of the atomic spectrum. A system of integro-differential equations numerically solved is obtained. The results obtained in this work have been tested against the numerical solution of the time-dependent Schrodinger equation. Good agreement has been obtained. ATI peaks splitting related to the Autler-Townes effect is discussed.