Enhancement of the Femtosecond Third Harmonic Generation by Charge Transfer Process in Poly (N-Vinylcarbazole) /C₆₀ Film

The femtosecond third harmonic generaction (THG) output has been measured from a series of poly(N-vinylcarbazole) (PVK), C₆₀, mixed and multilayer PVK/C₆₀ films which were all fabricated by physical jet deposition technique. There is an enhancement of femtosecond THG output from the mixed PVK/ C₆₀ film in comparison with other films. Charge transfer complex in the mixed PVK/ C₆₀ film was considered to be the main reason for this increase of the third-order susceptibility.