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Charge controlled, fixed optic axis analog (“v-shaped”) switching of a bent-core ferroelectric liquid crystal

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4 Author(s)
OCallaghan, Michael J. ; Displaytech, Inc., 2602 Clover Basin Drive, Longmont, Colorado 80301 ; Wand, Michael D. ; Walker, Christopher M. ; Nakata, Michi

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Recently discovered anticlinic ferroelectric liquid crystals (FLCs) offer a mode of fast fixed-optic-axis electro-optic modulation useful for a variety of applications. In addition, the high spontaneous polarization of a member of this class of FLCs (∼500–600 nC/cm2) suggests that it is a good candidate for electrostatically controlled thresholdless analog switching, whereas conventional SmC* FLCs have a binary response. Using a simple charge control drive circuit, we have found that this FLC is in fact capable of hysteresis-free analog switching. An optical model suggests that this class of FLCs might be engineered to have a much larger electro-optic effect than seen in this example.

Published in:

Applied Physics Letters  (Volume:85 ,  Issue: 26 )

Date of Publication:

Dec 2004

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