INVESTIGATION OF POLAR STRUCTURE IN FERROELECTRIC LIQUID CRYSTALLINE PHASE OF CHIRAL BENT-CORE MOLECULES BY MEANS OF SECOND HARMONIC GENERATION

Abstract

Recently a new type of ferroelectricity was found in a fluid smecric phase of a new type of bent-shaped molecule, called P-8-O-PIMB6, which is a P-8-O-PIMB analogue bui has chiral carbons in both end chains. Since the polar ordcr is eguivalent to a nonsymmctric molecular arrangement. the ferroelectric system can be highly active for second-order nonlinear optics. So the second-order nonlinear phenomenon (ex. SHG: Second Harmonic Generation) becomes a powerful tool to irrvestigate these polar properties. In this study. we measured transmitted SHG from well-aligned domains in the ferroelectric phase of the P-8-O-PIlMB6 to look into the layer structure.