Laser-induced ionic excitation in one-dimensional model

Abstract

We study the rescattering dynamics of a one-dimensional hydrogen molecule with the nuclei fixed at various internuclear distances. By analysing the laser-intensity dependence of the yields of the ions, we show that the rescattering process strongly depends on the internuclear distance. The dynamics of the ionic excitation is found to reflect the interplay of the rescattering dynamics and the charge-resonant states of the ion. In addition, we propose an internuclear collisional excitation mechanism for interpreting the enhanced excitation of the ion at large nuclear distances.