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Asymmetric switching in a ferrielectric liquid crystal device
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Image of FIG. 1.
FIG. 1.

Integrated intensity of the Bragg peak as a function of time during the application of the bipolar pulse in the (●) and (◯) phases. The bipolar pulse (2 ms duration) is superimposed on the data .

Image of FIG. 2.
FIG. 2.

The change in smectic layer spacing during the switching cycle in the (●) and (◯) phases. The solid lines are a guide for the eyes.

Image of FIG. 3.
FIG. 3.

Schematic illustrations of the repeat unit of the three-layer ferrielectric phase with the sample adopting (a) splayed director orientation and (b) uniform director orientation. The view is along the layer normal with the ellipses representing projections of the director and the arrows representing dipoles. The layers in the three-layer structure would not normally be adjacent but would lie one behind the other. (c) A possible switching mechanism in the ferrielectric phase. The solid arrows again indicate the dipole associated with each layer and the dashed arrows indicate the preferred route during the switching cycle. Note that the total contribution to polarization from the states is , respectively, and therefore the contribution from the intermediate state shown is .


Generic image for table
Table I.

The experimental responses in and phases.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Asymmetric switching in a ferrielectric liquid crystal device