Second-harmonic generation from corona-poled synthetic polypeptides containing disperse red-1 side chains

Zbigniew Tokarski; Bob L. Epling; Edward T. Samulski; Timothy M. Grinstead; Thomas M. Cooper; Robert L. Crane

doi:10.1117/12.144048

27 April 1993 Second-harmonic generation from corona-poled synthetic polypeptides containing disperse red-1 side chains

Zbigniew Tokarski, Bob L. Epling, Edward T. Samulski, Timothy M. Grinstead, Thomas M. Cooper, Robert L. Crane

Proceedings Volume 1853, Organic and Biological Optoelectronics; (1993) https://doi.org/10.1117/12.144048
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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 (I_s^2(omega)/I_q^2(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.

Citation Download Citation

Zbigniew Tokarski, Bob L. Epling, Edward T. Samulski, Timothy M. Grinstead, Thomas M. Cooper, and Robert L. Crane "Second-harmonic generation from corona-poled synthetic polypeptides containing disperse red-1 side chains", Proc. SPIE 1853, Organic and Biological Optoelectronics, (27 April 1993); https://doi.org/10.1117/12.144048

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