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Proceedings Paper

Second-harmonic generation from corona-poled synthetic polypeptides containing disperse red-1 side chains
Author(s): Zbigniew Tokarski; Bob L. Epling; Edward T. Samulski; Timothy M. Grinstead; Thomas M. Cooper; Robert L. Crane
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Paper Abstract

Synthetic polypeptides containing Disperse Red 1 (4-[N-ethyl, N- hydroxyethylamino]-4'-nitroazobenzene) nonlinear optical side chains were synthesized. The extent of side chain modification was ca. 10% and higher modifications were expected to produce crystallization of the polar NLO molecule and polymer insolubility. These polymers displayed a lyotropic liquid crystalline phase above a concentration of 15 - 20% (w/w) in dichloromethane. Corona poling (1.0 (mu) A/-5 kV) was used to align the Disperse Red 1 molecules of modified poly[L-glutamic acid] or modified poly[(gamma) -methyl-L-glutamate] thin films (1 - 2 micrometers ) that were produced by spin coating onto ITO covered glass substrates. Decay of the second harmonic (SH) signal was the slowest for films aligned by corona-onset poling at elevated temperatures (COPET) and the fastest for films aligned at room temperature. The SH intensities at 532 nm were comparable to the 1 mm thick, y-cut quartz standard and the (Is2(omega)/Iq2(omega))1/2 values were measured as a function of the film temperature during corona poling. The biexponential decay model was used to describe the trends in SH decay.

Paper Details

Date Published: 27 April 1993
PDF: 9 pages
Proc. SPIE 1853, Organic and Biological Optoelectronics, (27 April 1993); doi: 10.1117/12.144048
Show Author Affiliations
Zbigniew Tokarski, Science Applications International Corp. (United States)
Bob L. Epling, Science Applications International Corp. (United States)
Edward T. Samulski, Univ. of North Carolina/Chapel Hill (United States)
Timothy M. Grinstead, Air Force Wright Lab. (United States)
Thomas M. Cooper, Air Force Wright Lab. (United States)
Robert L. Crane, Air Force Wright Lab. (United States)

Published in SPIE Proceedings Vol. 1853:
Organic and Biological Optoelectronics
Peter M. Rentzepis, Editor(s)

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