Liquid crystal ‘blue phases’ with a wide temperature range
@article{Coles2005LiquidC, title={Liquid crystal ‘blue phases’ with a wide temperature range}, author={Harry J. Coles and Mikhail N. Pivnenko}, journal={Nature}, year={2005}, volume={436}, pages={997-1000} }
Liquid crystal ‘blue phases’ are highly fluid self-assembled three-dimensional cubic defect structures that exist over narrow temperature ranges in highly chiral liquid crystals. The characteristic period of these defects is of the order of the wavelength of visible light, and they give rise to vivid specular reflections that are controllable with external fields. Blue phases may be considered as examples of tuneable photonic crystals with many potential applications. The disadvantage of these…
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References
SHOWING 1-10 OF 22 REFERENCES
Polymer-stabilized liquid crystal blue phases
- Physics, Materials ScienceNature materials
- 2002
This work shows the stabilization of blue phases over a temperature range of more than 60 K including room temperature (260–326 K), and demonstrates an electro-optical switching with a response time of the order of 10−4 s for the stabilized blue phases at room temperature.
Electric Field Induced Phase Transitions and Colour Switching in the Blue Phases of Chiral Nematic Liquid Crystals
- Physics
- 1989
Abstract The phase behavior and electro-optic phenomena observed in a new system of blue phase mixtures have been determined. The mixtures, which include both cyanobiphenyl and chiral ester…
Blue phases of cholesteric liquid crystals as thermotropic photonic crystals
- PhysicsPhysical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
- 2000
The study of dye-doped low pitch cholesteric liquid crystals in their blue phases as an example of tunable "weak" photonic crystals is proposed and demonstrated and fluorescence emission of the dyes is shown to be affected by the presence of the blue phases.
Lasing in a three-dimensional photonic crystal of the liquid crystal blue phase II
- PhysicsNature materials
- 2002
The first observations of lasing in three-dimensional photonic crystals, in the cholesteric blue phase II are reported, showing that distributed feedback is realized in three dimensions, resulting in almost diffraction-limited lasing with significantly lower thresholds than in one dimension.
Strong flexoelectric behavior in bimesogenic liquid crystals
- Physics
- 2006
In this paper, we demonstrate strong flexoelectric coupling in bimesogenic liquid crystals. This strong coupling is determined via the flexoelectro-optic effect in chiral nematic liquid crystals…
Chirality in liquid crystals
- Chemistry
- 1991
Chirality has become arguably the most important and complex topic of research in liquid crystals today. The reduced symmetry in these organized phases leads to a variety of novel phase structures,…
Blue phases as photonic crystals
- PhysicsSPIE Optics + Photonics
- 2003
The Liquid Crystalline Blue Phases (LC BPs) and their diffraction patterns were investigated experimentally and theoretically. We stabilized Blue Phases and measured their diffraction pattern for…
Electro-optic effects in blue phases
- Physics
- 1989
Abstract A theory of electro-optic and elasto-optic effects in the blue phases of cholesteric liquid crystals is developed. The case of small structure deformations and a weak field is considered:…
The effect of electric fields on blue phases
- Physics
- 1991
Abstract An experimental review on electric field effects in blue phases is presented. Electric fields have a profound effect on these phases which appear in chiral liquid crystals. In addition to…
Electro-Optical Effects of a Small-Pitch Blue-Phase System
- Physics
- 1985
Abstract A system which shows a relatively large blue-phase range is investigated. Owing to the small value of the cholesteric pitch the blue-phase shows no Bragg-reflections in visible light.…