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Proceedings Paper

Push-pull polyenes and carotenoids with enhanced quadratic nonlinear optical susceptibilities
Author(s): Mireille H. Blanchard-Desce; Vincente Bloy; Jean-Marie Lehn; Claude Runser; Marguerite Barzoukas; Alain F. Fort; Joseph Zyss
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Paper Abstract

A wide choice of push-pull polyenes and carotenoids of increasing length (up to 30 angstrom) and bearing various donor and acceptor end groups has been synthesized in order to investigate the chain-length dependence of their quadratic hyperpolarizability (beta) . (beta) measurements have been performed using the electric field induced second harmonic generation (EFISH) technique. In each series of homologous compounds, the lengthening of the conjugation path results in a pronounced increase in (mu) (beta) values. This behavior leads to very large static (mu) (beta) (0) values for the longest molecules and can be modeled by (mu) (beta) (0) equals kna relationships with respect to the number n of double bonds in the polyenic chain. The exponent value (a) was found to depend on the end groups. The replacement of a double bond by a triple bond in the middle of the polyenic chain results in a blue shift of the charge transfer absorption band and leads to smaller (mu) (beta) (0) values. However, this phenomenon is modulated by the end groups.

Paper Details

Date Published: 15 May 1994
PDF: 10 pages
Proc. SPIE 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications, (15 May 1994); doi: 10.1117/12.173826
Show Author Affiliations
Mireille H. Blanchard-Desce, College de France (France)
Vincente Bloy, College de France (France)
Jean-Marie Lehn, College de France (France)
Claude Runser, Inst. de Phys-Chimie des Materiaux de Strasbourg (France)
Marguerite Barzoukas, Inst. de Phys-Chimie des Materiaux de Strasbourg (France)
Alain F. Fort, Inst. de Phys-Chimie des Materiaux de Strasbourg (France)
Joseph Zyss, Ctr. National d'Etudes des Telecommunications (France)


Published in SPIE Proceedings Vol. 2143:
Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications
Seth R. Marder; Joseph W. Perry, Editor(s)

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