Asymmetric Freedericksz Transitions from Symmetric Liquid Crystal Cells Doped with Harvested Ferroelectric NanoparticlesOptics Express
AbstractThe 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.
CopyrightCopyright © 2010, Optical Society of America
PublisherOptical Society of America
Citation InformationGary Cook, Victor Yu. Reshetnyak, Ron F. Ziolo, S. A. Basun, et al.. "Asymmetric Freedericksz Transitions from Symmetric Liquid Crystal Cells Doped with Harvested Ferroelectric Nanoparticles" Optics Express Vol. 18 Iss. 16 (2010)
Available at: http://works.bepress.com/partha_banerjee/32/