Fig. 3
Description of the data analysis and laser-assisted photoelectric effect (LAPE). a Experimental photoelectron spectrum of unexcited NO2 obtained with an XUV photon energy of 27.1 eV. The dashed blue lines indicate the peak position of each band. The color bars label the energy domains that are analyzed further in Figs. 4 and 5 (b) Experimental difference spectrum showing the excited-state photoelectron bands in red (gain) and depletion of XUV-only peaks (blue). The colormap is given in percent of the (1)1A′ peak in the XUV-only spectrum. The time convention is that for negative times the XUV pulse comes first. c Calculated LAPE spectrum (see text). The arrows indicate which photoelectron band (blue dashes) is shifted to which final position by the energy of one UV photon (3.1 eV) (red dashes). d Difference spectrum averaged over the delay range from 150 to 500 fs. An XUV-only spectrum is shown in the same plot in order to highlight depletion dominated regions
