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

Abstract

The second hyperpolarizabilities, <gamma(-3(omega; 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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 28, 1994
Accession Number
ADA281177

Entities

People

  • James Tour
  • Lap-tak Cheng
  • Peter V. Bedworth
  • Ruilian Wu

Organizations

  • University of South Carolina

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Chemistry
  • Demographic Cohorts
  • Electric Fields
  • Measurement
  • Military Research
  • Nonlinear Optics
  • Oligomers
  • Optical Properties
  • Optics
  • Radiation
  • Saturation
  • Second Harmonic Generation
  • South Carolina
  • Third Harmonic Generation
  • United States
  • Wave Mixing

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Plasma Physics / Magnetohydrodynamics
  • Polymer Science and Technology