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Proceedings Paper

Expanding role of aromatic heterocyclic rings as functional groups in the design of new nonlinear optical materials
Author(s): Bruce A. Reinhardt; Ramamurthi Kannan; Jay C. Bhatt
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Paper Abstract

A great deal of work has taken place over the last several years centering on the synthesis and development of organic molecules as nonlinear optical materials for various signal processing applications. Although substantial progress has been made in advancing these materials toward practical military and commercial applications various limitations have yet to be resolved. These include limited environmental, thermal, and alignment stability, narrow optical transparency ranges (especially at 830 nm), and low nonresonant nonlinearity. The nature of aromatic heterocyclic rings allows them to function as either electron rich or electron deficient centers thereby making it possible to tailor the (pi) electron distribution within individual molecules. Heterocyclic aromatic rings offer structural building blocks that can be used by the synthetic chemist to design new molecules which exhibit marked differences in the mechanism of their nonlinear response as well as increased environmental and thermal stability. In addition improvements in the transparency at shorter wavelengths and in compatibility with high performance thermoplastic polymer hosts have been realized. In this presentation, the second-order NLO properties for a number of chromophores containing various heterocyclic rings which have been synthesized in our research program will be discussed. Correlations between molecular structure, physical properties, optical properties, and NLO activity will be considered as well as comparisons made with more conventional chromophores.

Paper Details

Date Published: 6 July 1994
PDF: 9 pages
Proc. SPIE 2229, Nonlinear Optical Materials for Switching and Limiting, (6 July 1994); doi: 10.1117/12.179590
Show Author Affiliations
Bruce A. Reinhardt, Air Force Wright Lab. (United States)
Ramamurthi Kannan, AdTech Systems Research Inc. (United States)
Jay C. Bhatt, Systran Corp. (United States)


Published in SPIE Proceedings Vol. 2229:
Nonlinear Optical Materials for Switching and Limiting
M. J. Soileau, Editor(s)

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