New photorefractive polymer composites doped with liquid nonlinear optical chromophores

摘要

Photorefractive polymer composites were synthesized based on poly (N-vinylcazbazole) (PVK) doped with liquid nonlinear optical chromophores and a sensitizer C60. PVK/liquid NLO chromophores/C60 devices showed no signs of phase separation and did not require a plasticizer, such as ethylcarbazole. The composites showed 69% diffraction efficiency (C3) and a rapid response time of 46 ms (C1) in four-wave mixing experiments at a light intensity of 60 mW/cm2 and a wavelength of 633 nm.