The Influence of the Molecular Structure on the Second-Order Nonlinear Optical Properties of Pyroelectric Liquid Crystalline Polymers

摘要

Pyroelectric Liquid Crystl Polymers (PLCP), a novel class of material with intrinsic polar order developed in our laboratory, are discussed. thin films (2-4#mu#m) of PLCP were prepared by photopolymerization of ferroelectric liquid crystalline monomers in the chiral smectic C (SmC~*) phase. The poly(acrylate) materials have been structurally modified in order to improve their nonlinear optical and thermal properties. Further are their longterm nonlinear optical properties discussed based on results from second harmonic generation (SHG), spontaneous polarization (Ps), and dielectric spectroscopy.