Fig. 6
Ultrafast THz dynamics under interband and intraband photoexcitations. Pump-induced THz field changes ΔEsample as a function of pump-probe delay Δtpp after a 390 meV (3.18 μm) and b 248 meV (5 μm) photoexcitations at various fluences and T = 5 K. The gate time tgate is fixed at the peak of the static THz field shown in Fig. 1d. One of the THz traces from a (pink curve, 1.6 μJ cm−2) is also plotted in b as a filled gray curve for better comparison
