Femtosecond nonlinear optical spectroscopy of CdSe colloidal semiconductor nanocrystals

The nonlinear absorption and refraction coefficients CdSe nanocrystals (D~4 nm) in toluene were estimated to be ~4.6 x 10-15 W/cm and ~2 x 10-15 cm2/W using a femto-second single beam Z-scan nonlinear spectroscopy.