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Proceedings Paper

Structure/quadratic hyperpolarizability correlation: solvent effect
Author(s): Marguerite Barzoukas; Jacques Muller; Alain F. Fort; Seth R. Marder; Valerie Alain; Mireille H. Blanchard-Desce
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Paper Abstract

In this work, we have investigated theoretically the structure/hyperpolarizability correlations of push-pull molecules sing a two-form two-state model. For this, we have defined a parameter MIX characterizing the mixing between the two-limiting resonance forms and thus ruling the molecular structure and polarization. Also, we have analyzed the solvent effect on the structure and on the polarizabilities of push-pull molecules using the Onsager reaction field theory. We have shown that the dependences of the linear and nonlinear polarizabilities on the solvent dielectric constant look similar to the structure/(hyper)polarizability correlations. Finally, we have investigated experimentally the solvent effect on a series of push-pull polyenes of increasing length. In particular, we have determined the scalar (mu) g(Beta) (0) product (where (mu) g is the ground-state dipole and (Beta) (0) the vector part of static quadratic hyperpolarizability tensor) in different solvents using the electric-field-induced-second-harmonic generation technique. For the different chain lengths, we have obtained a mapping of the positive (mu) g(Beta) (0) peak. This leads for the longest compound of the series to a record high value of (mu) g(Beta) (0) product in chloroform.

Paper Details

Date Published: 1 November 1996
PDF: 10 pages
Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996); doi: 10.1117/12.256168
Show Author Affiliations
Marguerite Barzoukas, Institut de Physique et Chimie des Materiaux de Strasbourg (France)
Jacques Muller, Institut de Physique et Chimie des Materiaux de Strasbourg (France)
Alain F. Fort, Institut de Physique et Chimie des Materiaux de Strasbourg (France)
Seth R. Marder, Beckman Laser Institute and Medical Clinic (United States)
Valerie Alain, Ecole Normale Superieure (France)
Mireille H. Blanchard-Desce, Ecole Normale Superieure (France)

Published in SPIE Proceedings Vol. 2852:
Nonlinear Optical Properties of Organic Materials IX
Gustaaf R. Moehlmann, Editor(s)

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