Molecular organization of nematic liquid crystals between concentric cylinders: Role of the elastic anisotropy

2015 ◽  
Vol 91 (2) ◽  
Author(s):  
C. Chiccoli ◽  
P. Pasini ◽  
L. R. Evangelista ◽  
R. T. Teixeira-Souza ◽  
C. Zannoni
Keyword(s):  
Liquid Crystals ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Molecular Organization ◽  
Concentric Cylinders

Nematic liquid crystals in planar and cylindrical hybrid cells: Role of elastic anisotropy on the director deformations

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
R. T. Teixeira-Souza ◽  
C. Chiccoli ◽  
P. Pasini ◽  
L. R. Evangelista ◽  
C. Zannoni
Keyword(s):  
Liquid Crystals ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Hybrid Cells

New structure induced by elastic anisotropy in cylindrical nematic liquid crystal

2017 ◽  
Vol 13 (2) ◽  
pp. 4705-4717
Author(s):  
Zhang Qian ◽  
Zhou Xuan ◽  
Zhang Zhidong
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Gennes Theory

Basing on Landau–de Gennes theory, this study investigated the chiral configurations of nematic liquid crystals confined to cylindrical capillaries with homeotropic anchoring on the cylinder walls. When the elastic anisotropy (L2/L1) is large enough, a new structure results from the convergence of two opposite escape directions of the heterochiral twist and escape radial (TER) configurations. The new defect presents when L2/L1≥7 and disappears when L2/L1<7. The new structure possesses a heterochiral hyperbolic defect at the center and two homochiral radial defects on both sides. The two radial defects show different chiralities.

scholarly journals Anisotropic wave propagation in nematic liquid crystals

Soft Matter ◽  
2014 ◽  
Vol 10 (41) ◽  
pp. 8296-8307 ◽  
Author(s):  
Paolo Biscari ◽  
Antonio DiCarlo ◽  
Stefano S. Turzi
Keyword(s):  
Wave Propagation ◽  
Liquid Crystals ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals

We show that elastic anisotropy and relaxation are at the origin of the main experimental features of nematoacoustics.

scholarly journals REFRACTION OF NONLINEAR LIGHT BEAMS IN NEMATIC LIQUID CRYSTALS

2012 ◽  
Vol 21 (03) ◽  
pp. 1250033 ◽  
Author(s):  
GAETANO ASSANTO ◽  
NOEL F. SMYTH ◽  
WENJUN XIA
Keyword(s):  
Steady State ◽  
Liquid Crystals ◽  
Solitary Waves ◽  
Nematic Liquid Crystals ◽  
Optical Solitons ◽  
Numerical Results ◽  
Dielectric Interface ◽  
Modulation Theory ◽  
Light Beams

We use modulation theory to analyze the interaction of optical solitons and vortices with a dielectric interface between two regions of nematic liquid crystals. In the analysis we consider the role of nonlocality, anisotropy and nonlinear reorientation and compare modulation theory results with numerical results. Upon interacting with the interface, nematicons undergo transverse distortion but remain stable and eventually return to a steady state, whereas vortices experience an enhanced instability and can break up into bright beams or solitary waves.

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