The Electric Field Dependence of the Laser Induced Holographic Grating Relaxation of Photorefractive Polymer

Abstract

Laser induced holographic grating relaxation (HGR), electro-optical (EO) and second harmonic generation (SHG) studies have been carried out in a guest/host system subject to an external electric field with and without the presence of a hole transport agent. The guest is NNI, which has moderate second order nonlinear optical (NLO) coefficient, the host is PMMA and the hole transport agent is DEH. (See the text for the exact names of the acronyms.) In the presence of DEH, the lifetime of the cis isomer of NNI detected by using the HGR technique is lengthened by the application of an electric field of moderate strength. The field dependence effect is not observed when DEH is absent in the sample. The result is interpreted as due to the stabilization of the cis-isomer by the electric field polarized DEH. The data obtained from SHG and EO measurements appear to corroborate the HGR result.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA252641

Entities

People

  • C. H. Wang
  • J. M. Takacs
  • R. J. Ma
  • Stephen Ducharme
  • X. Q. Zhang

Organizations

  • University of Nebraska–Lincoln

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Argon Lasers
  • Chemical Synthesis
  • Chemistry
  • Diffraction
  • Electric Fields
  • Films
  • Glass Transition Temperature
  • Ion Lasers
  • Ionizing Radiation
  • Laser Beams
  • Lasers
  • Measurement
  • Military Research
  • Radiation
  • Relaxation Time
  • Second Harmonic Generation

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers