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Proceedings Paper

Design of chromophores for nonlinear optical applications
Author(s): Donald M. Burland; J. E. Rice; John Downing; Josef Michl
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Paper Abstract

In designing chromophores for second harmonic generation applications one would like to have a large hyperpolarizability (beta) and an absorption well away from the second harmonic frequency. Unfortunately, there appears to be a connection between the experimentally observed absorption maximum energy and the observed zero-frequency hyperpolarizability (beta) 0, when comparing different molecules within a class, such as donor/acceptor substituted benezenes and stilbenes, that makes this difficult to achieve. In this paper, the origins of this relationship are investigated by comparing results from semi-empirical calculations with experimental values. A significant contribution to the observed relationship between absorption maximum and (beta) 0 is seen to arise from frequency dependences of the ground and excited state dipole moments. Since the two-level model for (beta) is used both as an extrapolation technique to obtain (beta) 0 and as a tool for analyzing the data, a discussion of the validity of this model is also presented.

Paper Details

Date Published: 1 December 1991
PDF: 9 pages
Proc. SPIE 1560, Nonlinear Optical Properties of Organic Materials IV, (1 December 1991);
Show Author Affiliations
Donald M. Burland, IBM/Almaden Research Ctr. (United States)
J. E. Rice, IBM/Almaden Research Ctr. (United States)
John Downing, Univ. of Colorado/Boulder (United States)
Josef Michl, Univ. of Colorado/Boulder (United States)

Published in SPIE Proceedings Vol. 1560:
Nonlinear Optical Properties of Organic Materials IV
Kenneth D. Singer, Editor(s)

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