A study of photoacoustic effects and optical limiting in the solution of C-60 in toluene

Pulsed photoacoustic studies in solution of C-60 in toluene have been made using the 532 nm radiation from a frequency doubled Nd:YAG laser. Though C-60 is found to exhibit the phenomenon of optical limiting, the results on photoacoustic measurements do not give any indication of multiphoton transitions as suggested in some of the earlier works. Results of photoacoustic measurements show that excited state absorption is the dominant process responsible for optical limiting while phenomena like nonlinear scattering may contribute to a lesser extent.