Accession Number : ADP007464

Title :   Third Order Optical Nonlinearity in a Polymer Composite,

Corporate Author : MINNESOTA MINING AND MFG CO ST PAUL SCIENCE RESEARCH LAB

Personal Author(s) : White, K.M. ; Harelstad, R.E. ; Francis, C.V. ; Gerbi, D.J. ; Stevens, J.

Report Date : FEB 1991

Pagination or Media Count : 6

Abstract : Third-order optical nonlinearity in organic materials has generally been sought from molecules and Polymers having extended 7c-electron delocalization in conjugated bonding schemes. In an alternative approach, we have investigated the third-order optical response of a polymeric composite containing charge transfer complexes in which the nonlinearity originates from intermolecular electron delocalization between pi-electron clouds in charge transfer stacks. The material, which is composed of a polymer having electron donating pendant side groups that complex with dopant electron-acceptor molecules, has been processed into an optically clear thin film. Nonlinear characterization of the film by means of third-harmonic generation suggests enhancement of the third-order response arising from charge transfer interactions.

Descriptors :   *ELECTRON ACCEPTORS, *ORGANIC MATERIALS, *OPTICS, APPROACH, AUGMENTATION, BONDING, CHARGE TRANSFER, CLOUDS, ELECTRONS, FILMS, HARMONICS, MATERIALS, MOLECULES, POLYMERS, RESPONSE, THIN FILMS, THIRD HARMONIC GENERATION, TRANSFER.

Subject Categories : Optics
      Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE