Asymmetric switching of antiferroelectric liquid-crystal cells

Otón, J. M.; Pena, J. M. S.; Quintana, X.; Gayo, J. L.; Urruchi, V.
April 2001
Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2422
Academic Journal
Antiferroelectric liquid-crystal cells usually show symmetric electro-optic switching response from the antiferroelectric state to two opposite ferroelectric states. Intermediate transmission levels (analog gray scale) can be stabilized, applying a constant dc bias voltage after switching. Modifying the manufacturing process and using narrow dynamic-range antiferroelectric materials, a fully asymmetric response has been achieved. This asymmetric switching allows the antiferroelectric cell to be driven as a ferroelectric cell, reducing or eliminating the bias voltage, and ultimately leading to analog optical multistability, i.e., devices whose optical transmission may be arbitrarily set and maintained without power supply. © 2001 American Institute of Physics.


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