We present experimental evidence of polarity dependent thresholdless switching in ferroelectricchiral smectic C liquid crystals (Sm-C*) confined by an ion-store electrochromic film. Theinteraction between high polarization Sm-C* liquid crystals and a mixed conductor film of tungstenoxide is responsible for unipolar hysteretic electro-optic behavior. According to Clark’s model @N.A. Clark et al., Liq. Cryst. 27, 985 ~2000!#, in the limit of high spontaneous polarization, theelectro-optics of Sm-C* liquid crystals are dominated by electrostatics. Here, we discuss the ionstore film’s influence on analogue ‘‘V-shaped’’ switching due to different electrostatic contributionsfor each polarity of the applied field.
Unipolar ‘‘V-shaped’’ switching in chiral smectic C Sm–C* liquid crystals bounded by an ion-store film
STRANGI, Giuseppe;VERSACE, Consolato Carlo;SCARAMUZZA, Nicola;
2002-01-01
Abstract
We present experimental evidence of polarity dependent thresholdless switching in ferroelectricchiral smectic C liquid crystals (Sm-C*) confined by an ion-store electrochromic film. Theinteraction between high polarization Sm-C* liquid crystals and a mixed conductor film of tungstenoxide is responsible for unipolar hysteretic electro-optic behavior. According to Clark’s model @N.A. Clark et al., Liq. Cryst. 27, 985 ~2000!#, in the limit of high spontaneous polarization, theelectro-optics of Sm-C* liquid crystals are dominated by electrostatics. Here, we discuss the ionstore film’s influence on analogue ‘‘V-shaped’’ switching due to different electrostatic contributionsfor each polarity of the applied field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
