Accession Number:

ADA277409

Title:

New Developments in Second-Order Nonlinear Optical Polymeric Materials

Descriptive Note:

Technical rept. 1 Jun 1993-31 May 1994

Corporate Author:

MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY

Report Date:

1994-03-17

Pagination or Media Count:

13.0

Abstract:

Second harmonic generation from the spin coated films of an asymmetrically substituted polydiacethlene, namely poly8-butoxy cardonylmethyl urethanyl 1-5-pyrimidyl-octa-1,3- diyneBPOD is reported for the first time. The macromolecules assemble to produce the organization responsible for SHG without recourse to poling. d33 of the spin coated film 0.19-0.31 micrometers thickness are between 0.78-0.88 pmV without absorption correction and 3.32-5. 57 pmV after correction. Angular and polarization dependence study of the second harmonic response suggests that the film has in-plane isotropy as a whole and the net dipole is nearly perpendicular to the film surface. Spontaneous orientation of the polymer chains during the film formation seems to be responsible for the noncentrosymmetric alignment of the polymer. SHG from the Langmuir Blodgett films are also reported. Second harmonic generation, Polydiacetylene, Spin coated films, Langmuir Blodgett films, Nonlinear optical, Polymeric materials, Aromatic substituents, SHG, PDA.

Subject Categories:

  • Organic Chemistry
  • Polymer Chemistry
  • Laminates and Composite Materials
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE