Numerical simulations of attosecond streaking time delays in photoionization

We present results of numerical simulations and theoretical classical analysis of time delays with respect to the instant of ionization in a numerical streaking experiment. These results confirm our previous interpretation of the streaking time delay as a finite-range and fieldweighted time delay. We show that in the streaking experiments the time delay strongly depends on the parameters of the streaking field. Consequently, the streaking time delay is accumulated over a finite range in space, which the emitted electron probes after its transition into the continuum until the streaking pulse ceases. Moreover, we confirm by results of our numerical simulations that the streaking time delay can be understood as a sum (or integral) over field-free time delays weighted by the relative instantaneous field strength during the propagation of the photoelectron.