scholarly journals Wavelength-tuneable laser emission from stretchable chiral nematic liquid crystal gels via in situ photopolymerization

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31919-31924 ◽  
Author(s):  
S. M. Wood ◽  
F. Castles ◽  
S. J. Elston ◽  
S. M. Morris
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Liquid Crystalline ◽  
Laser Emission ◽  
Mechanical Strain ◽  
Chiral Nematic

We describe a technique for creating multi-coloured liquid crystalline laser gels which may be selectively and reversibly wavelength-tuned by applying a mechanical strain.

A robust and inexpensive all optical switch with chiral nematic liquid crystal

2021 ◽  
Vol 119 ◽  
pp. 111306
Author(s):  
Hossein mehrzad ◽  
Ezeddin Mohajerani ◽  
Mohammad Mohammadimasoudi ◽  
Kristiaan Neyts
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Optical Switch ◽  
Chiral Nematic ◽  
All Optical ◽  
All Optical Switch

Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

2013 ◽  
Vol 103 (10) ◽  
pp. 101105 ◽  
Author(s):  
S. M. Morris ◽  
M. M. Qasim ◽  
K. T. Cheng ◽  
F. Castles ◽  
D.-H. Ko ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Chiral Nematic

scholarly journals Mechanisms of Chiral Transfer in Optically Active Dopant – Nematic Liquid Crystal Systems

2020 ◽  
Vol 20 (4) ◽  
pp. 6-26
Author(s):  
V. A. Burmistrov ◽  
V. V. Aleksandriiskii ◽  
I. V. Novikov ◽  
O. I. Koifman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
High Efficiency ◽  
Stationary Phases ◽  
Theoretical Description ◽  
Optically Active ◽  
Axial Coordination ◽  
Chiral Dopants

Induction of helical mesophases by incorporating chiral dopants into the nematics matrix is the promising modern trends in the chemistry of liquid crystals. This process is associated with a unique phenomenon - an amplification of chirality in liquid-crystalline phases, which ensures the detection of enantiomers by their chiral induction, much more sensitive than other methods. The relevance of this approach is due to the need to create perspective electro-optical devices operating with ultra-low control voltages based on twist effects, chromatographic stationary phases with high chiral selectivity, flexible magnets, photo-sensitive nanostructures, and other smart LC materials. The successful solution of these problems is impossible without experimental research and theoretical comprehension of the mechanisms of third level chiral transfer optically active dopant – nematic liquid crystal. In the last decade, a large number of works have appeared on the solution of these problems. This review is devoted to a generalization of the experimental results and a theoretical description of the transfer of molecular chirality to orientationally ordered systems with the participation of both chiral molecular substituents with an asymmetric carbon atom and planar or quasi-planar fragments chirally distorted relative to each other. The stereochemical aspects of induction associated with the structural correspondences of the dopant and nematic liquid crystal, as well as the main classes of optically active additives, are discussed. Application of metal complexes, both Werner and macroheterocyclic, are presented. Special attention is paid to the results of the mechanisms study of chiral transfer due to various intermolecular interactions: hydrogen bonding, axial coordination, and the formation of inclusion compounds. The high efficiency of induction of spiral mesophases has been demonstrated with a combination of different self-assembly mechanisms in liquid crystal - chiral additive systems.

Studies on the electro‐optical properties of chiral nematic liquid crystal/aerosil particle composites

2008 ◽  
Vol 35 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Bofu Li ◽  
Hua Huang ◽  
Xiaokang Ding ◽  
Wenbo Li ◽  
Yuhai Yin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Chiral Nematic

scholarly journals Microsecond-range optical shutter for unpolarized light with chiral nematic liquid crystal

AIP Advances ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 047122
Author(s):  
Mohammad Mohammadimasoudi ◽  
Jungsoon Shin ◽  
Keechang Lee ◽  
Kristiaan Neyts ◽  
Jeroen Beeckman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Unpolarized Light ◽  
Chiral Nematic ◽  
Optical Shutter

Broadband Reflection Gels Prepared from Microcapsules Containing Chiral Nematic Liquid Crystal with Negative Dielectric Anisotropy

2012 ◽  
Vol 27 (5) ◽  
pp. 583-589
Author(s):  
李克轩 LI Ke-xuan ◽  
王慧慧 WANG Hui-hui ◽  
张立培 ZHANG Li-pei ◽  
何万里 HE Wan-li ◽  
曹晖 CAO Hui ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Dielectric Anisotropy ◽  
Chiral Nematic
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