Experimental study of third-order nonlinear optical properties in C60-TTF dyads with saturated (-C-C-) chemical bonds

We report measurements of the third-order nonlinear optical susceptibilities of a novel dyads of C-60-TTF with saturated (-C-C-) chemical bonds in solutions were performed using degenerate four wave mixing (DFWM) technique at lambda = 532 nm in picosecond regime. The third-order nonlinear susceptibilities values, and the corresponding figures of merits are evaluated. The optical power limiting properties of the mentioned compounds are measured using picosecond laser pulses at the same wavelength lambda = 532 nm. A correlation between the length of the carbon chain (i.e., the increase of the number of saturated (-C-C-) bonds and third-order susceptibilities is found. (C) 2002 Published by Elsevier Science B.V.