Accession Number:

ADA281177

Title:

Third Harmonic Generation Study of Alpha-Thiophene Oligomers: Monomer to Octamer

Descriptive Note:

Technical rept.

Corporate Author:

SOUTH CAROLINA UNIV COLUMBIA DEPT OF CHEMISTRY AND BIOCHEMISTRY

Report Date:

1994-06-28

Pagination or Media Count:

17.0

Abstract:

The second hyperpolarizabilities, gamma-3omega omega, omega, omega, of alpha-thiophene oligomers up to the octamer have been measured with third-harmonic generation experiments. Measurements in THF solutions with 1.91 micrometer fundamental radiation found significantly lower nonlinearity and conjugation length dependence in comparison with reported results obtained from DC electric field-induced second-harmonic generation and degenerate four-wave mixing measurements. A previously reported nonlinearity saturation for the extended oligomers was also not evident in the current study.

Subject Categories:

  • Organic Chemistry
  • Polymer Chemistry
  • Electricity and Magnetism
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE