Polarized XANES and optical SHG studies on the LC/polyimide interfaces

Abstract

Second harmonic generation (SHG) is a powerful tool to estimate the orientation of liquid crystal (LC) molecules absorbed on a polyimide(PI) surface. However, with SH active PI, we need to separate SH signal of the LC molecules from that of the PI film. It is not necessary that the SH light from the PI film is spatially coherent, that causes the analysis difficult. To solve this problem, we propose an analysis which strictly treat the problem.