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Effects of Varying Surfactants on the Electrooptical Switching Characteristics of Volume holograms recorded in PDLC'S

Published online by Cambridge University Press:  03 September 2012

V. P. Tondiglia ,
L. V. Natarajan ,
R. M. Neal ,
R. L. Sutherland  and
T. J. Bunning
V. P. Tondiglia
Affiliation:
Science Applications International Corporation 4031 Col. Glenn Highway, Beavercreek, OH 45431
L. V. Natarajan
Affiliation:
Science Applications International Corporation 4031 Col. Glenn Highway, Beavercreek, OH 45431
R. M. Neal
Affiliation:
Materials Directorate, Wright Laboratory WPAFB, OH 45433–7702
R. L. Sutherland
Affiliation:
Science Applications International Corporation 4031 Col. Glenn Highway, Beavercreek, OH 45431
T. J. Bunning
Affiliation:
Science Applications International Corporation 4031 Col. Glenn Highway, Beavercreek, OH 45431
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Abstract

The effects of adding various chemical surfactants to the prepolymer syrup on the electro-optical switching properties of Bragg gratings recorded in polymer dispersed liquid crystals (PDLC's) have been studied. The gratings were holographically recorded in prepolymer recipes substituting hexanoic, heptanoic, propylpentanoic and octanoic acids as surfactants in the recipe. A small percentage of monomer containing an attached long chain alkyl group (vinyl neononanoate) was also used instead of a surfactant. The addition of surfactants resulted in lowering the required switching field from 17 V/μm with no surfactant to 1.5 to 8 V/μm at a concentration of about 6.7% by weight, depending on the surfactant. Field on response times for electrical switching decreased with the addition of surfactant, and off times increased.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 479: Symposium S – Materials for Optical Limiting II , 1997 , 235
Copyright
Copyright © Materials Research Society 1997

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