Simultaneous observation of transient and final state dynamics in ultrafast strong-field excitation via time-resolved photoelectron spectroscopy

摘要: Strong-field coherent control deals with the efficient excitation of a quantum system into preselected final state. In order to understand underlying mechanisms, transient dynamics laser-dressed states need be considered in addition. this paper, we present route towards complete picture non-perturbative control. To end, study near-resonant chirped potassium atoms as model for resonant strong-field Combining two-colour pump–probe scheme photoelectron spectroscopy, simultaneously observe state and strongly driven atom. As demonstrated on prototype scenario, enables detailed understanding physical mechanisms governing interaction. Our results highlight power time-resolved spectroscopy shed light onto different aspects