Abstract

This talk will include selective results from our comprehensive program in nonlinear optical effects in organic molecules and polymers. We have calculated microscopic nonlinearities of organic molecules in several series of conjugated structures using ab-initio SCF approach coupled with the finite field method. The effects of increase in the II - electron conjugation length, molecular conformation, heavy atom effect and the role of substitutes have been investigated in order to derive an understanding of molecular structure-property relation so that structural parameters associated with enhanced optical nonlinearities can be identified. This theoretical study has been complemented with the measurements of optical nonlinearities in sequentially built and systematically derivatized structures.

© 1988 Optical Society of America