Dynamics of Third-Order Nonlinear Optical Processes in Langmuir-Blodgett andEvaporated Films of Phthalocyanines

摘要

The results of degenerate four-wave mixing studies performed on evaporated filmsof metal-free phthalocyanine and Langmuir-Blodgett films of a silicon phthalocyanine using subpiosecond 602nm pulses are reported. The third-order nonlinearity of all the samples is high permitting the observation of the degenerate four-wave mixing signal from even a monolayer. In both cases, the third-order nonlinearity has a resonant character and the observed time-resolved phase conjugate signals provide information on the dynamics of excitons.