Bistability of left- and right-handed π-twist states in a pixel-isolated dual-frequency nematic liquid crystal cell

Bistability of left- and right-handed π-twist states in a pixel-isolated dual-frequency nematic liquid crystal cell

The authors propose a bistable nematic liquid crystal cell which has two stable states of left- and right-handed π-twist. The switching between the two states is achieved by using a dual-frequency liquid crystal material and sequential waveform of low and high frequencies. Each state is stabilized b...

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Veröffentlicht in:Applied physics letters 2008-04, Vol.92 (17)
Hauptverfasser: Lee, Seong Ryong, Lee, Joong Ha, Yoon, Tae-Hoon, Kim, Jae Chang
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container_title Applied physics letters
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creator Lee, Seong Ryong
Lee, Joong Ha
Yoon, Tae-Hoon
Kim, Jae Chang
description The authors propose a bistable nematic liquid crystal cell which has two stable states of left- and right-handed π-twist. The switching between the two states is achieved by using a dual-frequency liquid crystal material and sequential waveform of low and high frequencies. Each state is stabilized by a multidimensional anchoring effect of a pixel-isolating polymer wall without any chiral additives. Therefore, the elastic free energies of left- and right-handed π-twist states are almost the same. As a result, the two states show superior retention time in spite of the topological equivalence.
doi_str_mv 10.1063/1.2908918
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title Bistability of left- and right-handed π-twist states in a pixel-isolated dual-frequency nematic liquid crystal cell
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