Preparation of plasma poly(1-isoquinolinecarbonitrile) thin film and its ultrafast nonlinear optical property

摘要: How to get a uniform, defect-free, and reproducible conjugated polymer thin films is now becoming the main fabrication problem for practical application of these materials as fast switches modulators in opto-electronic devices. In this research, novel plasma-polymerized 1-isoquinolinecarbonitrile (PPIQCN) film was prepared by plasma polymerization under different glow discharge conditions. The effect power on chemical structure surface compositions deposited PPIQCN investigated Fourier transform infrared (FTIR), UV-Visible absorption spectra X-ray photoelectron spectroscopy (XPS). results show that high retention aromatic ring starting monomer obtained when low 10 W used during formation. case higher 30 W, more severe molecular fragmentation can be observed, which decrease effective conjugation length film. morphology characterized atomic force microscopy (AFM) indicates fine, homogenous could relatively power. A femtosecond time-resolved optical Kerr technique at wavelength 820 nm has been applied investigate third-order nonlinearity For first time, non-resonant ultrafast response observed.