ELLIPSOMETRIC MEASUREMENTS OF THE POLARIZABILITY ANISOTROPIES OF PUSH-PULL MOLECULES IN SOLUTION

We have developed an experimental setup for the measurement of the pol arizability anisotropy of push-pull molecules in solution. We have use d this technique to investigate prototype push-pull molecules that hav e been incorporated as doping chromophores in low glass transition tem perature photorefractive polymers. Results obtained evidence for these compounds that the refractive index modulation is dominated by the or ientational birefringence contribution while the electro-optic contrib ution remains small. (C) 1998 American Institute of Physics.