Figure 2.

In-plane scattering signal along $Q_z$ around the Bragg-like peak at $2.1 \mathrm{n}{\mathrm{m}}^{-1}$. (a) Circular dots represent the intensity of experimental data for various time delays, while solid lines correspond to a Gaussian model fit. (b) Peak intensity derived from the Gaussian model plotted against time delay. Circular dots denote the maximum intensity values from (a), while the dashed line represents a refinement using an error function. Blue color denotes the lower laser intensity of $8\times {10}^{14} \mathrm{W}/\mathrm{c}{\mathrm{m}}^2$ while red indicates the higher laser intensity of $8\times {10}^{15} \mathrm{W}/\mathrm{c}{\mathrm{m}}^2$. (c) $Q_z$-position of the Bragg-like peak. The dashed lines represent refinements using an exponential model.