Figure 6From: Tunable nonlinear optical properties in nanocrystalline Si/SiO2 multilayers under femtosecond excitationOpen aperture Z-scan traces of samples D and E. (a) Sample D and (b) sample E under two laser intensity, I1 = 3.54 × 1011 W/cm2 (open square) and I2 = 3.54 × 1012 W/cm2 (full square). The solid lines are the fitting curves of the experimental data.Back to article page