Optically Nonlinear Polymeric Materials.

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1983
Accession Number
ADA188810

Entities

People

  • R. C. Hall

Organizations

  • American Society for Engineering Education

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aldehydes
  • Chemical Engineering
  • Chromophores
  • Crystal Lattices
  • Crystal Structure
  • Dyes
  • Electrons
  • Engineering
  • Films
  • Hydrophobic Properties
  • Langmuir Blodgett Films
  • Materials
  • Monomolecular Films
  • Polymeric Films
  • Polymers
  • Second Harmonic Generation
  • Spine

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.
  • Polymer Science and Technology

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition
  • Microelectronics