Control of molecular orientation in twist nematic, liquid crystal cells

1985 ◽  
Vol 20 (6) ◽  
pp. 875-878 ◽  
Author(s):  
T. Beica ◽  
S. Frunz?? ◽  
M. Giurgea ◽  
R. Moldovan
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Molecular Orientation ◽  
Crystal Cells

Nematic liquid crystal cells for optical spatial solitons (Nematicons)

2007 ◽  
Author(s):  
A. De Luca ◽  
A. Veltri ◽  
L. Pezzi ◽  
G. Coschignano ◽  
C. Umeton ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Spatial Solitons ◽  
Optical Spatial Solitons ◽  
Crystal Cells

scholarly journals Vortices Nucleation By Inherent Fluctuations In Nematic Liquid Crystal Cells

2021 ◽  
Author(s):  
Esteban Aguilera ◽  
Marcel G. Clerc ◽  
Valeska Zambra
Keyword(s):  
Liquid Crystal ◽  
Optical Tweezers ◽  
Nematic Liquid Crystal ◽  
Topological Defects ◽  
Optical Vortices ◽  
Topological Features ◽  
Nucleation Mechanisms ◽  
Multistable Systems ◽  
Light Beams ◽  
Crystal Cells

Abstract Multistable systems are characterized by exhibiting domain coexistence, where each domain accounts for the different states. In the case of these systems are described by vectorial fields, domains are connected through topological defects. Vortices are one of the most frequent and studied topological defect points. Optical vortices are equally relevant for their fundamental features as beams with topological features and their applications in image processing, telecommunications, optical tweezers, and quantum information. The interaction of light beams with matter vortices in liquid crystal cells is a natural source of optical vortices. The rhythms that govern the emergence of matter vortexes due to fluctuations are not established. Here we investigate the nucleation mechanisms of the matter vortices in liquid crystal cells and establish statistical laws that govern them. Based on a stochastic amplitude equation, the law for the number of nucleated vortices as a function of anisotropy, voltage, and noise level intensity is set. Experimental observations in a nematic liquid crystal cell with homeotropic anchoring and a negative anisotropic dielectric constant under the influence of a transversal electric field show a fair agreement with the theoretical findings.

Charge Injection and Generation in Nematic Liquid Crystal Cells

1997 ◽  
Vol 36 (Part 1, No. 2) ◽  
pp. 773-776 ◽  
Author(s):  
Shuichi Murakami ◽  
Hiroyoshi Naito
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Charge Injection ◽  
Crystal Cells
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