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In-plane bistable nematic liquid crystal devices based on nanoimprinted surface relief
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View: Figures


Image of FIG. 1.
FIG. 1.

Variation of the free energy density when the relative anchoring strength, , 0.8, 1, 1.3, and 2. The LC director is shifted according to variation of .

Image of FIG. 2.
FIG. 2.

AFM image of nanosized substrate feature which was transferred from a mold pattern into spin coated polymethylmethacrylate (PMMA) by NIL. Their pitches were all for both directions and their heights were 160 and . Then, the bistability was realized at azimuthally .

Image of FIG. 3.
FIG. 3.

Dual in-plane electrode structure to obtain dark and bright states in this bistability under crossed polarizers. The upper substrate is monostable treated by rubbing and the lower substrate is bistable with a fourfold symmetrical bidirection nanometer-scale surface grating.

Image of FIG. 4.
FIG. 4.

Polarizing microscopic image measured in our actual bistable device using PMMA LC alignment layer. (a) and (b) are dark and bright states obtained by the operating principle. Dark lines are chrome electrodes. Maintainable time of each state under no field is nearly permanent.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: In-plane bistable nematic liquid crystal devices based on nanoimprinted surface relief