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Proceedings Paper

Nonlinear Optical Response Of Polymer Dispersed Liquid Crystal Materials
Author(s): P Palffy-Muhoray; J L West
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Paper Abstract

Composite materials consisting of liquid crystal droplets dispersed in a polymer binder may be switched from an opaque scattering state to a clear transparent state by application of a d.c. or low frequency a.c. electric field.1-3 This optoelectronic response is the result of the effect of the external field on the birefringence of the liquid crystal contained in the droplets. The applied electric field serves to align the liquid crystal in an orientation such that the refractive index of the droplet is matched with that of the polymer binder. In this paper we report observations of a nonlinear scattering mechanism in polymer dispersed liquid crystal films due to reorientation of the liquid crystal molecules by the optical field of a CW argon ion laser. Preliminary observations show an 80% reduction in the transmittance of these materials due to laser induced scattering.

Paper Details

Date Published: 14 July 1988
PDF: 9 pages
Proc. SPIE 0927, Wave Propagation and Scattering in Varied Media, (14 July 1988); doi: 10.1117/12.945842
Show Author Affiliations
P Palffy-Muhoray, Kent State University (United States)
J L West, Kent State University (United States)


Published in SPIE Proceedings Vol. 0927:
Wave Propagation and Scattering in Varied Media
Vasundara V. Varadan; Vijay K. Varadan, Editor(s)

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