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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 7 — Apr. 1, 2013
  • pp: 1013–1015

Bistable liquid crystal devices with nanoparticle-coated polyimide alignment films

Chuan-En Lee and Shie-Chang Jeng  »View Author Affiliations


Optics Letters, Vol. 38, Issue 7, pp. 1013-1015 (2013)
http://dx.doi.org/10.1364/OL.38.001013


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Abstract

Bistable hybrid-aligned nematic (HAN) liquid crystal devices (LCDs) with silica nanoparticle-coated polyimide alignment films were investigated. It was observed that the existence of the internal electric field produced from the triboelectrically charged silica nanoparticles layer and impurity ions in the LC reduced the total free energy of the HAN-LCD and stabilized the cell in the homeotropic state. The stable homeotropic state can be switched back to the HAN state by changing the ion distribution through a voltage pulse with proper polarity. The capability of controlling bistability through modification of ion density in the LC layer may have some applications, such as displaying a one-time password requiring a specific stable time.

© 2013 Optical Society of America

OCIS Codes
(230.2090) Optical devices : Electro-optical devices
(230.3720) Optical devices : Liquid-crystal devices
(160.4236) Materials : Nanomaterials

ToC Category:
Optical Devices

History
Original Manuscript: November 28, 2012
Revised Manuscript: February 8, 2013
Manuscript Accepted: February 19, 2013
Published: March 19, 2013

Citation
Chuan-En Lee and Shie-Chang Jeng, "Bistable liquid crystal devices with nanoparticle-coated polyimide alignment films," Opt. Lett. 38, 1013-1015 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-7-1013


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