2011
DOI: 10.1063/1.3662391
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A microsecond-response polymer-stabilized blue phase liquid crystal

Abstract: A polymer-stabilized blue-phase liquid crystal (BPLC) with microsecond response time is demonstrated using a vertical field switching cell. The measured decay time is 39 μs at room temperature (21 °C) and then decreases to 9.6 μs at 44.3 °C. Such a response time is 1-2 orders of magnitude faster than that of a typical BPLC device. The responsible physical mechanisms are the collective effects of short pitch length, strong polymer network, and low viscosity through temperature effect. The on-state voltage of ou… Show more

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Cited by 108 publications
(73 citation statements)
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References 22 publications
(17 reference statements)
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“…It is known that the BPLC response time in the low field region where lattice distortion does not occur is primarily governed by the viscosity, average elastic constant, and pitch length. 7,23,37 Polymer structure and polymer concentration also play important roles. 32 Although the viscosity of our JC-BP06N is quite high, the monomer (TMPTA) we employed has three functional groups, which provides strong crosslinking networks and helps reduce the response time.…”
mentioning
confidence: 99%
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“…It is known that the BPLC response time in the low field region where lattice distortion does not occur is primarily governed by the viscosity, average elastic constant, and pitch length. 7,23,37 Polymer structure and polymer concentration also play important roles. 32 Although the viscosity of our JC-BP06N is quite high, the monomer (TMPTA) we employed has three functional groups, which provides strong crosslinking networks and helps reduce the response time.…”
mentioning
confidence: 99%
“…Polymer-stabilized blue-phase liquid crystal (PS-BPLC) 1-5 exhibits three distinctive features: (1) self-assembly process so that no surfactant (e.g., rubbed polyimide layer) is needed to generate uniform molecular alignment, (2) nanoscale ($100 nm) double-twist cylinder diameter and short coherence length, which leads to microsecond response time, 6,7 and (3) three-dimensional lattice structure resulting in optically isotropic voltage-off state. Alignment-layer-free process greatly simplifies device fabrication process.…”
mentioning
confidence: 99%
“…Since the rising operating temperature diminishes the rotational viscosity, the relaxation process becomes faster (cf. 9.13) [127]. The findings about the mode stability of BP random lasing indicate that the grain size and orientational uniformity are believed to play a crucial role in the stability of BP under the influence of external stimuli (cf.…”
Section: Optical Isotropy and Fast Electro-optic Responsementioning
confidence: 95%
“…There is no viewing angle problem when a BPLCD is driven by an electric field, so there has been a shift in attention from a focus on in-plane-switching (IPS) to vertical-field-switching (VFS) [5][6][7][8][9][10]. Because there is no brightness by normal incident light, a VFS BPLCD needs an oblique incident light source that their configurations are complicated and costly in real manufacturing.…”
Section: Introductionmentioning
confidence: 99%