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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 16 — Aug. 2, 2010
  • pp: 17339–17345

Asymmetric Freedericksz transitions from symmetric liquid crystal cells doped with harvested ferroelectric nanoparticles

G. Cook, V. Yu. Reshetnyak, R. F. Ziolo, S. A. Basun, P. P. Banerjee, and D. R. Evans  »View Author Affiliations


Optics Express, Vol. 18, Issue 16, pp. 17339-17345 (2010)
http://dx.doi.org/10.1364/OE.18.017339


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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.

© 2010 OSA

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(160.2260) Materials : Ferroelectrics
(160.3710) Materials : Liquid crystals

ToC Category:
Materials

History
Original Manuscript: January 21, 2010
Revised Manuscript: July 20, 2010
Manuscript Accepted: July 21, 2010
Published: July 30, 2010

Citation
G. Cook, V. Yu. Reshetnyak, R. F. Ziolo, S. A. Basun, P. P. Banerjee, and D. R. Evans, "Asymmetric Freedericksz transitions from symmetric liquid crystal cells doped with harvested ferroelectric nanoparticles," Opt. Express 18, 17339-17345 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-16-17339


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References

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