Table 1. Time constants of the free carrier dynamics extracted by fitting the THz transient measured (Fig. 2A) at peak position of THz pulse using biexponential decay function.

Pump fluence (μJ/cm2)	τ1 (ps)	τ2 (ps)
300	0.23 ± 0.04	2.9 ± 0.2
400	0.18 ± 0.01	3.5 ± 0.4
450	0.26 ± 0.01	5.0 ± 0.1
500	0.17 ± 0.01	7.2 ± 0.9
550	0.20 ± 0.01	9.0 ± 2.0