New Developments in Second-Order Nonlinear Optical Polymeric Materials

Abstract

Second harmonic generation from the spin coated films of an asymmetrically substituted polydiacethlene, namely poly((8-butoxy cardonylmethyl urethanyl) 1-(5-pyrimidyl)-octa-1,3- diyne(BPOD) 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 pm/V without absorption correction and 3.32-5. 57 pm/V 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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 17, 1994
Accession Number
ADA277409

Entities

People

  • B. Bihari
  • D. W. Cheong
  • Jayant Ram Kumar
  • Sukant K. Tripathy
  • W. K. Kim

Organizations

  • University of Massachusetts Lowell

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Advanced Materials
  • Alkynes
  • Angle Of Incidence
  • Chemistry
  • Films
  • Massachusetts
  • Materials
  • Materials Science
  • Monomolecular Films
  • Polymers
  • Second Harmonic Generation
  • Spectra
  • Thin Films
  • United States
  • Universities

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology