scholarly journals Molecular ejection transition in liquid crystal columns self-assembled from wedge-shaped minidendrons

Soft Matter ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 22-29 ◽  
Author(s):  
William S. Fall ◽  
Ming-Huei Yen ◽  
Xiangbing Zeng ◽  
Liliana Cseh ◽  
Yongsong Liu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Statistical Modelling ◽  
First Order ◽  
Self Assembled

A first-order mesophase transition between 4-dendron and 3-dendron columns, resulting from temperature-induced molecular ejection, is discovered and explained via statistical modelling.

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.

scholarly journals Photo-tunable epsilon-near-zero behavior in a self-assembled liquid crystal – nanoparticle hybrid material

2021 ◽  
Author(s):  
Amit Bhardwaj ◽  
Vimala Sridurai ◽  
Sachin A. Bhat ◽  
Channabasaveshwar V. Yelamaggad ◽  
Geetha G. Nair
Keyword(s):  
Liquid Crystal ◽  
Hybrid Material ◽  
Room Temperature ◽  
Dynamic Tuning ◽  
Actinic Light ◽  
Self Assembled ◽  
Epsilon Near Zero

A room temperature stable self-assembled liquid crystal metamaterial exhibits dynamic tuning of the epsilon-near-zero (ENZ) bandwidth on illumination with actinic light in the optical regime.

scholarly journals First-order liquid crystal orientation transition on inhomogeneous substrates

2004 ◽  
Vol 69 (2) ◽  
Author(s):  
Ophelia K. C. Tsui ◽  
Fuk Kay Lee ◽  
Baoshe Zhang ◽  
Ping Sheng
Keyword(s):  
Liquid Crystal ◽  
Crystal Orientation ◽  
First Order ◽  
Liquid Crystal Orientation

Fast liquid crystal end-less polarisation controller for first order PMD compensation

2003 ◽  
Vol 58 (9-10) ◽  
pp. 1364-1377
Author(s):  
Laurent Dupont ◽  
Jean -Louis de Bougrenet de la Tocnaye ◽  
Michel Gadonna ◽  
Thierry Sansoni
Keyword(s):  
Liquid Crystal ◽  
First Order ◽  
Pmd Compensation
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