In this work, we present the experimental evidence of a polarity sensitive electro-optic response ina nematic liquid crystal. The liquid crystal cell was made by using a standard sandwichconfiguration, with one of the indium tin oxide electrodes covered by a thin layer of tungstentrioxide (WO3!, deposited by sputtering. The optical response was inhibited when the electrodecovered by WO3 film was anodically charged, while the usual optical response occurred under areverse field. An ionic diffusion process was associated with the establishment of an internal electricfield, which inhibited unipolarly the optical switching.
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|Titolo:||Asymmetric Response To Electric Field In A Liquid Crystal Cell Containing A Layer Of Amorphous Tungsten Trioxide|
|Data di pubblicazione:||1999|
|Appare nelle tipologie:||1.1 Articolo in rivista|