Asymmetric Freedericksz Transitions from Symmetric Liquid Crystal Cells Doped with Harvested Ferroelectric Nanoparticles

Author(s)

Gary Cook, Air Force Research Laboratory
Victor Yu. Reshetnyak, University of Kyiv
Ron F. Ziolo, Centro de Investigación en Química Aplicada
S. A. Basun, Air Force Research Laboratory
Partha P. Banerjee, University of DaytonFollow
Dean R. Evans, Air Force Research Laboratory

Document Type

Article

Publication Date

8-2010

Publication Source

Optics Express

Abstract

The electrical Freedericksz transition characteristics of planar aligned liquid crystal cells doped with harvested single ferroelectric domain 9 nm nanoparticles of BaTiO3 have been measured. We demonstrate for the first time that the electrical pre-history of the cells imparts significant polarity sensitivity to the Freedericksz characteristics. The presence of harvested single domain ferroelectric nanoparticles enables cells to be programmably semi-permanently polarized. This reduces or increases the Freedericksz transition threshold by 0.8 V, depending on the polarity of the applied voltage, giving a net 1.6 V Freedericksz threshold asymmetry for 8 μm thick cells filled with TL205 liquid crystal.

Inclusive pages

17339-17345

ISBN/ISSN

1094-4087

Comments

Permission documentation is on file.

Copyright

Copyright © 2010, Optical Society of America

Publisher

Optical Society of America

Volume

18

Peer Reviewed

yes

Issue

16

eCommons Citation

Cook, Gary; Reshetnyak, Victor Yu.; Ziolo, Ron F.; Basun, S. A.; Banerjee, Partha P.; and Evans, Dean R., "Asymmetric Freedericksz Transitions from Symmetric Liquid Crystal Cells Doped with Harvested Ferroelectric Nanoparticles" (2010). Electrical and Computer Engineering Faculty Publications. 239.
https://ecommons.udayton.edu/ece_fac_pub/239