(a) Time-resolved electronic population in the lowest conduction for selected reciprocal-space pathways. The starting point is k = 0 for the blue curve and k = − 0.05 k max for the green curve. The dots on both curves denote the moments when the electrons pass through the Γ point. The dashed red curve shows the electric field whose central frequency is resonant with the bandgap of GaAs. Adapted from ^[41]. (b) Calculated k-integrated population dynamics for coupled interband and intraband mechanism case (red curve), pure interband case (blue cure), and pure intraband case (green curve). The parameters of electric field are much close to that in (a). Adapted from Ref. ^[42].