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Nonresonant Third-Order Nonlinear Polarizability in Linear Conjugated Molecules

Published online by Cambridge University Press:  25 February 2011

S. H. Stevenson ,
D. S. Donald  and
G. R. Meredith
S. H. Stevenson
Affiliation:
Central Research and Development Department, E. I. DuPont de Nemours & Co., Inc., Experimental Station, Wilmington, Delaware 19898
D. S. Donald
Affiliation:
Central Research and Development Department, E. I. DuPont de Nemours & Co., Inc., Experimental Station, Wilmington, Delaware 19898
G. R. Meredith
Affiliation:
Central Research and Development Department, E. I. DuPont de Nemours & Co., Inc., Experimental Station, Wilmington, Delaware 19898
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Abstract

Crude pictures relating molecular features and enhancement of nonresonant second-order hyperpolarizability have been known and successfully utilized in selection and preparation of materials for nonlinear-optical applications for over a decade. On the other hand, other than the requirement of “electron delocalization”, such a useful picture does not exist for nonresonant third-order hyperpolarizability. In pursuit of such a picture, and to obtain a better view of the range of hyperpolarizability magnitudes which might be obtainable, simple linear conjugated molecules have been synthesized and characterized. Liquid solutions of these model compounds were studied using recently developed high precision optical third harmonic generation techniques. Results of these characterizations and a new addition to the picture of structure-property relationships are reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 109: Symposium K – Nonlinear Optical Properties of Polymers , 1987 , 103
Copyright
Copyright © Materials Research Society 1988

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References

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