Figure 6
Energy spectra of electrons at \(t=37.5{T}_{0}\): (a) \({a}_{0}=5\); (b) \({a}_{0}=10\); (c) \({a}_{0}=15\); (d) \({a}_{0}=20\). The red curve represents the energy spectrum in the MST case, while the blue curve represents the energy spectrum in the planar target case. Only the electrons with x-coordinate behind the rear side of the substrate and longitudinal momentum \({P}_{x} > 0\) are counted.
