scholarly journals Tuneable multicoloured patterns from photonic cross-communication between cholesteric liquid crystal droplets

2014 ◽  
Vol 2 (5) ◽  
pp. 806-810 ◽  
Author(s):  
JungHyun Noh ◽  
Hsin-Ling Liang ◽  
Irena Drevensek-Olenik ◽  
Jan P. F. Lagerwall
Keyword(s):  
Liquid Crystal ◽  
Photonic Crystals ◽  
Cholesteric Liquid Crystal ◽  
Self Assembled

Cholesteric liquid crystal droplets are self-assembled spherical photonic crystals. Multiple droplets in the same plane communicate optically, giving rise to unique patterns of circularly polarised and strongly coloured spots. We explain the phenomenon and outline routes to application.

scholarly journals Light-Driven Pitch Tuning of Self-Assembled Hierarchical Gratings

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 326
Author(s):  
Yuan-Hang Wu ◽  
Sai-Bo Wu ◽  
Chao Liu ◽  
Qing-Gui Tan ◽  
Rui Yuan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Soft Matter ◽  
Cholesteric Liquid Crystal ◽  
Functional Materials ◽  
Wave Pattern ◽  
Photonic Devices ◽  
Archimedean Spiral ◽  
First Order ◽  
Diffraction Angle ◽  
Self Assembled

Gratings are of vital importance in modern optics. Self-assembled cholesteric liquid crystal (CLC) gratings have attracted intensive attention due to their easy fabrication and broad applications. However, simultaneously achieving arbitrary patterning and delicate tuning of CLC gratings remains elusive. Here, light-driven pitch tuning is accomplished in hierarchical gratings formed in a molecular switch doped CLC. We fabricate a checkerboard hierarchical CLC grating for a demonstration, whose pitch is optically tuned from 4.6 µm to 10.7 µm. Correspondingly, the first-order diffraction angle continuously changes from 9.4° to 4.8° and a significant polarization selectivity is also observed. In addition, hierarchical CLC gratings with triangular wave pattern, Archimedean spiral, and radial stripes are also demonstrated. This work creates new opportunities for soft-matter-based intelligent functional materials and advanced photonic devices.

Dispersion of proton spin-lattice relaxation in a cholesteric liquid crystal

1983 ◽  
Vol 44 (10) ◽  
pp. 1179-1184 ◽  
Author(s):  
M. Vilfan ◽  
R. Blinc ◽  
J. Dolinšek ◽  
M. Ipavec ◽  
G. Lahajnar ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Lattice Relaxation ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Spin Lattice

scholarly journals Flow-assisted self-healing of the helical structure in a cholesteric liquid crystal

2021 ◽  
Vol 155 (5) ◽  
pp. 054903
Author(s):  
Jan-Christoph Eichler ◽  
Robert A. Skutnik ◽  
Marco G. Mazza ◽  
Martin Schoen
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Helical Structure ◽  
Self Healing

scholarly journals The temperature dependence of the helical pitch in a cholesteric liquid crystal

2021 ◽  
pp. e1881638
Author(s):  
Robert A. Skutnik ◽  
Jan-Christoph Eichler ◽  
Marco G. Mazza ◽  
Martin Schoen
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Cholesteric Liquid Crystal ◽  
Helical Pitch
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