Peculiarities of spatial soliton formation in azobenzene liquid crystal

2018 ◽  
Author(s):  
Rafael Drampyan ◽  
Tigran Dadalyan ◽  
Anahit Gogyan ◽  
Yuri Malakyan ◽  
Jeroen Beeckman ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Soliton

scholarly journals Realization of particular liquid crystal cells for propagation and characterization of optical spatial soliton

2006 ◽  
Vol 14 (12) ◽  
pp. 5548 ◽  
Author(s):  
Antonio De Luca ◽  
Gianluca Coschignano ◽  
Cesare Umeton ◽  
Marco Morabito
Keyword(s):  
Liquid Crystal ◽  
Spatial Soliton ◽  
Crystal Cells

Readdressable Interconnects With Spatial Soliton Waveguides in Liquid Crystal Light Valves

2010 ◽  
Vol 22 (10) ◽  
pp. 694-696 ◽  
Author(s):  
Armando Piccardi ◽  
Alessandro Alberucci ◽  
Umberto Bortolozzo ◽  
Stefania Residori ◽  
Gaetano Assanto
Keyword(s):  
Liquid Crystal ◽  
Spatial Soliton

Variational approach to spatial soliton formation in bulk nematic liquid crystal cells

2006 ◽  
Author(s):  
Lambros Halastanis ◽  
Georgios Papazisimos ◽  
Manos Manousakis ◽  
Sotiris Droulias ◽  
Nikolaos Moshonas ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Variational Approach ◽  
Spatial Soliton ◽  
Crystal Cells

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

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