Accession Number : ADA188810
Title : Optically Nonlinear Polymeric Materials.
Descriptive Note : Final rept.,
Corporate Author : AMERICAN SOCIETY FOR ENGINEERING EDUCATION WASHINGTON DC
Personal Author(s) : Hall, R C
PDF Url : ADA188810
Report Date : Jan 1983
Pagination or Media Count : 15
Abstract : A new class of optically nonlinear hemicyanine substituted PECH polymers has been synthesized and processed into noncentrosymmetric Langmuir-Blodgett films that exhibit strong SHG. Quadratic enhancement of Second Harmonic Generation has been achieved up to eight monomolecular layers, more than in any other material yet reported in the literature. Increasing the optical nonlinearity of the attached chromophore by extending the pi-electron system and changing the electron donating group have increased the SHG efficiency of a monolayer by nearly a factor of 100. If further improvements in chromophore optical nonlinearity and quadratic enhancement can be achieved in a greater number of layers, these films may someday be an alternative to currently used inorganic crystalline laser frequency doublers.
Descriptors : *POLYETHERS, *OPTICAL MATERIALS, *POLYMERIC FILMS, ELECTRONS, HARMONIC GENERATORS, MOLECULES, NONLINEAR SYSTEMS, OPTICAL PROPERTIES, OPTIMIZATION, QUADRATIC EQUATIONS, SYNTHESIS(CHEMISTRY), FATTY ACIDS, MOLECULAR PROPERTIES, CHROMOPHORES
Subject Categories : Plastics
Distribution Statement : APPROVED FOR PUBLIC RELEASE