Extended Data Fig. 6: Effects of intensity averaging on the photoelectron spectrum.
From: Observation of Rabi dynamics with a short-wavelength free-electron laser
a, Photoelectron spectra generated with the analytic model for a single atom (solid line), and for a macroscopic sample (dashed line). A pulse length of 3/2 Rabi periods, and detuning of Δω = 62 meV was used. b-c, Same as a, but for the individual contributions of the two- and one-photon processes, respectively. The results in both b, and c are calculated for Δω = 0 meV, where the spectra are symmetric. The separate contributions are normalized to the maximum of the one-photon spectra for both the single-atom and intensity averaged signals.
