Fig. 9
Spacer and pump energy dependence of nonthermal response at the gap mode. Shift in the lifetime distribution peaks corresponding to nonthermal e–e scattering as pump energy (ħωpump) and Al2O3 spacer thickness are varied. An opposite trend is observed for the intermediate carriers. The different dependence of peak lifetime vs. pump energy of the three e-e components supports their assignment to distinct nonthermal electron populations whose decay is not isotropic. The dashed lines are guides to the eye
