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Proceedings Paper

Pulse poling of high performance nonlinear chromophores in polymers
Author(s): James Westphal; Antao Chen; Nathaniel Burt; Lih Lin; Larry Dalton; Jingdong Luo; Alex K.-Y. Jen
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Paper Abstract

Conjugated chromophores with permanent dipole moments can be aligned by heating a thin polymer film containing chromophores in an external electric field. The heated "guest-host" system is then cooled in the field to maintain the chromophores' alignment. Dielectric breakdown and charge transfer, however, often limit the external electric field to about 100 V/μm of film thickness. It was hypothesized that electrical pulses could increase the voltage of the poling field without damaging the sample films. This was achieved by combining an amplified waveform from a function generator with the DC poling field. Pulse amplitudes were varied from 10 to 103 V. Pulse frequencies were varied from 10-1 to 103 Hz with a duty cycle of up to 50% of the pulse period. Pulse amplitudes were found to have optimum effects at less than 15% of the DC field at low frequencies, 0.1-10 Hz, with a sinusoidal pulse shape. It was found that this technique induced up to a 20% improvement in optical properties without damaging the sample films.

Paper Details

Date Published: 14 September 2006
PDF: 11 pages
Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 63310H (14 September 2006); doi: 10.1117/12.698378
Show Author Affiliations
James Westphal, Univ. of Washington (United States)
Antao Chen, Univ. of Washington (United States)
Nathaniel Burt, Univ. of Washington (United States)
Lih Lin, Univ. of Washington (United States)
Larry Dalton, Univ. of Washington (United States)
Jingdong Luo, Univ. of Washington (United States)
Alex K.-Y. Jen, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 6331:
Linear and Nonlinear Optics of Organic Materials VI
Robert A. Norwood, Editor(s)

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