Absorptive and refractive nonlinearity of carbon nanotubes grown on Si substrate

The third-order susceptibility of multiwalled carbon nanotubes (MWCNTs) grown on Si substrate were measured using reflective Z-scan (RZ-scan) technique with femto-second laser pulses at 790 nm. The nonlinear absorption coefficient 'beta' and nonlinear refraction index 'gamma' were measured to be abo