Fig. 7: Comparison of the experimental and simulated amplitudes and phases of the oscillation components of the sidebands for dataset 2.

Comparison of the phases φ3ω (a, d), φ6ω (b, e) and ratio of the amplitudes A3ω/A6ω (c, f) derived from Eq. (12) for the experimental dataset 2 (black squares), SFA simulations (blue symbols) and TDSE simulations (red symbols), without (a–c) (circles) and with (d–f) (diamonds) the contribution of the harmonic H8. The error bars were obtained by error propagation considering the errors in the estimation of the phases and of the amplitudes in the two-cosine fit. The data of the XUV field are reported in Tables S1 and S2. The data are summarised in Table S4.