Synthesis and nonlinear optical properties of a cross-linkable system using sol-gel approach

Facile synthesis and electro‐optic activities of new polycarbonates containing tricyanofuran‐based nonlinear optical chromophores

“…In both kinds of polycarbonates, the r 33 values proportional increased as the increase of the chromophore concentration and the highest r 33 values of PC‐TCFCs and PC‐DFTCs (45 and 75 pm/V) were achieved by PC‐TCFC‐2 and PC‐DFTC‐3 at the chromophore concentrations of 28 and 34%. These results were larger than the same chromophore‐doped systems at the similar loading content, where the TCFC‐ and DFTC‐doped systems obtained the maximum r 33 values of 16 and 30 pm/V respectively. The great improvement of EO activities indicates that the intermolecular electrostatic interactions were effectively suppressed in this polymer system and these NLO chromophores could be well isolated on the polymer chain.…”

“…Atomic force microscope (AFM) is usually used to investigate the surface morphology of polymer films. It could reveal the domain structures of NLO chromophores, the film‐forming properties, and the differences of the films morphology before and after poling . Figure shows the AFM scans of the spin‐coated films of PC‐TCFC‐2 and PC‐DFTC‐3 before and after poling.…”