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
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE