Attosecond Ionization Time Delay Around a Shape Resonance in Nitrogen Measured by the RABBIT-2ω method

With the advent of attoscience, it becomes possible to measure the ionization time delay of an electron that escapes its original quantum system after absorbing an XUV photon. It is well established that RABBIT (Re-construction of Attosecond Beating By Interference of Two-photon transitions) protocol is sensitive to ionization time delays with an attosecond accuracy. This technique offers a dual spectral and temporal resolution with a simple analysis when the channels are well separated [1] . It has mainly been applied to systems with few active electronic states. Only recently, RABBIT has successfully been applied to a gaseous/liquid water mixture where strong spectral congestion takes place [2] .