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Optical Engineering

Molecular crystals and polymers for nonlinear optics
Author(s): Christian Bosshard; Georg Knoepfle; Philippe Pretre; Stephan Follonier; Christophe Serbutoviez; Peter Guenter
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Paper Abstract

We present new experimental results on second-harmonic generation in highly conjugated organic molecules and molecular crystals recently developed in our group, as well as on electro-optic eftects in thin-film polymers. A large value of the molecular hyperpolarizability of a new hydrazone-type molecule crystallizing in a noncentrosymmetric point group is reported. Large nonlinear optical coefticients of up to 840 ± 200 pmN were measured in crystals of 4'-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST). The new experimental results are compared with theoretical calculations of limiting values of nonlinear optical coefticients. Computer modeling of crystal structures shows good agreement with experimental results. Measurements on electro-optic polymers with high thermal stability are presented.

Paper Details

Date Published: 1 July 1995
PDF: 10 pages
Opt. Eng. 34(7) doi: 10.1117/12.200613
Published in: Optical Engineering Volume 34, Issue 7
Show Author Affiliations
Christian Bosshard, Swiss Federal Institute of Technology (Switzerland)
Georg Knoepfle, Swiss Federal institute of Technology (Switzerland)
Philippe Pretre, Swiss Federal Institute of Technology (Switzerland)
Stephan Follonier, Swiss Federal Institute of Technology (Switzerland)
Christophe Serbutoviez, Swiss Federal Institute of Technology (Switzerland)
Peter Guenter, Swiss Federal Institute of Technology Zuerich (Switzerland)

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