Influence of Polymerization Temperature on Hysteresis and Residual Birefringence of Polymer Stabilized Blue Phase LCs

Fan, Chun-Yuan; Jau, Hung‐Chang; Lin, Tsung‐Hsien; Yu, Fang Cheng; Huang, Tzung Chi; Liu, Chuyu; Sugiura, Norío

doi:10.1109/jdt.2011.2158805

Cited by 31 publications

(15 citation statements)

References 12 publications

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“…Hysteresis is not affected by polymer concentration but depends on the host liquid crystal and chiral dopants. 20 The influence of polymerization on temperature has also been reported by Fan et al 21 In our recent paper, 22 we have demonstrated completely distinct switching routes, determined by the frequency of the electric field applied; however, the characteristic is associated with ionic mobility.…”

Section: Introductionsupporting

confidence: 78%

Effect of the grain size on hysteresis of liquid‐crystalline Blue Phase I

et al. 2012

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Abstract— Three different blue‐phase I liquid‐crystal samples with different grain‐size distribution were studied. Polycrystalline platelet grains reflects light in the visible region and have been observed under a polarizing optical microscope. Green and blue grain areas have been measured and then the statistical histogram by the Gaussian distribution function was fitted and the mean grain size was calculated. The effect of hysteresis on grain size has been compared for the three samples. Hysteresis depends explicitly on the grain‐size distribution. Large grain size has revealed less hysteresis, while small grain size depicted pronounced hysteresis.

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Section: Introductionsupporting

confidence: 78%

Effect of the grain size on hysteresis of liquid‐crystalline Blue Phase I

et al. 2012

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“…Doping some high HTP chiral into the N*LC host suppresses the distortion, decreasing the dimensions of the BP domains or stabilizing the BP III texture may be the feasible way to solve this problem. 35,36 Kerr constants corresponding to the certain oblique angles can be calculated through the electric-field-dependent birefringence curves. By considering the extended Kerr effect, the Kerr constant can be obtained by linearly fitting the experimental data at the weak-field region, and the slope of the straight line is the Kerr constant.…”

Section: Resultsmentioning

confidence: 99%

Low‐temperature‐applicable polymer‐stabilized blue‐phase liquid crystal and its Kerr effect

et al. 2012

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Abstract— A type of polymer‐stabilized blue‐phase liquid crystal, which can be used in a low‐temperature environment, is proposed. The blue‐phase range after polymerization was widened to more than 73°C, and the blue‐phase texture is very stable even at a temperature as low as −35°C. The electro‐optical performances dependence on polymer concentration was investigated. The results indicate that the saturation voltage increases and the hysteresis enhances as the polymer concentration increases. The rise and decay times could reach as low as 391 and 789 μsec, respectively. Such material also shows good electro‐optical behavior at a temperature of −35°C. In addition, the Kerr constant was tested under a uniformly distributed electric field to be 2.195 nm/V2 at room temperature and 2.077 nm/V2 at −35°C. The Kerr constant tested under white‐light illumination was 1.975 nm/V2, which shows a small dispersion.

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“…When it comes to PSBP, though electrostriction is effectively restrained, the polymer network could still be deformed if the applied voltage is too high. It was reported that the electro-optic response of PSBP depends strongly on the polymerization and operating temperatures while almost independent on the phase on curing [125]. High curing temperature can reduce the driving voltage ( Fig.…”

Section: Optical Isotropy and Fast Electro-optic Responsementioning

confidence: 95%

Self-Organized 3D Photonic Superstructure: Blue Phase Liquid Crystal

Lin

Chen

2015

Anisotropic Nanomaterials

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Blue phase liquid crystals (BPLCs) have attracted considerable attention in recent years owing to their unique periodic structure and electro-optic properties. Besides the potential applications in the next generation display, BPLC with a cubic lattice structure can be regarded as a self-organized three-dimenstional (3D) photonic crystal that can be applied for photonic devices such as optical filter, optical attenuator, phase modulator, laser source and so on. This chapter will introduce the formation of BPLCs from both theoretical and experimental points of view. The stability and temperature range of BPLCs are also discussed followed by its photonic crystal structure, lattice orientation and phase identification. After a basic overview, this chapter will further introduce the applications of BPLCs, including controllability of photonic band gap with external fields, fast electro-optic Kerr effect, and optical nonlinear effect. This short summary shows that the century old intriguing BPLCs have diverse opportunities to offer in modern photonic materials and devices. Moreover, the current challenges in this area are expected to spark innovative ideas leading toward the design and engineering of new chiral materials that may furnish suitable BPLCs to produce advanced photonic materials that have desirable properties and functions.

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Influence of Polymerization Temperature on Hysteresis and Residual Birefringence of Polymer Stabilized Blue Phase LCs

Cited by 31 publications

References 12 publications

Effect of the grain size on hysteresis of liquid‐crystalline Blue Phase I

Effect of the grain size on hysteresis of liquid‐crystalline Blue Phase I

Low‐temperature‐applicable polymer‐stabilized blue‐phase liquid crystal and its Kerr effect

Self-Organized 3D Photonic Superstructure: Blue Phase Liquid Crystal

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