Nonlinear optical parameters of polyimide and toluene films containing full
erenes C-60 and C-70 are studied by the method of Z-scan, The nonlinear ref
ractive indices of these structures are measured at the emission wavelength
of a Nd:YAG laser at 1064 nm, The two-photon absorption and nonlinear susc
eptibility of solutions and films containing fullerenes are studied.