dye-doped nematic liquid crystals
Study on the Polarization of Random Lasers from Dye Doped Nematic Liquid Crystals
... in dye-doped nematic liquid crystals can be understood in the way that the random lasers can be regarded as random distributed feedback lasers [32]; the quasimodes are formed mainly by ...
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Resolution in optically addressed spatial light modulators based on dye doped liquid crystals
... Dye-doped nematic liquid crystals (LC) are studied as materials for single layer Optically Addressed Spatial Light Modulators ...(ASAQ) dye. The resolution in the ASAQ ...
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Dielectric Behaviour of Pure and Dye Doped Nematic Liquid Crystal BKS/B07
... and liquid crystals (LC) are well es- tablished materials for photonic and non-linear optical device applications because of their optical non linearity and very rapid optical response ...dichroic ...
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Electric field control of diffraction and noise in dye doped liquid crystals
... studied liquid crystals with dyes added either to the liquid crystal mixture [11] or to a polymer layer on the surface of a substrate ...the liquid crystal molecules re-orient and remain in ...
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Electrically tunable, optically induced dynamic and permanent gratings in dye doped liquid crystals
... in nematic liquid crystals that can be easily controlled by externally ap- plied ac ...red dye and no special polymer coatings of the cell surfaces, patterns can be created that persist for ...
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Line disclination dynamics in uniaxial nematic liquid crystals
... It is of interest to note the similarity between (11) to (16) and the time-dependent Ginzburg– Landau (TDGL) equations of superconductivity (see (14, 16)). This is most marked when the director field is constrained to ...
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Propagating director bend fluctuations in nematic liquid crystals
... time-dependent nematic director n(r, t), and its coupling to the hydrodynamic velocity field v(r, t), may be accessed experimentally at low wavenumber k and frequency ω by dynamic light ...
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Competition of lattice and basis for alignment of nematic liquid crystals
... Due to elastic anisotropy, two-dimensional patterning of substrates can promote weak azimuthal alignment of adjacent nematic liquid crystals. Here, we consider how such alignment can be achieved ...
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Flexoelectric polarization studies in bent core nematic liquid crystals
... aligned nematic (HAN) cell in which the director profile through the cell tilts by an angle of approximately 90 ◦ from one surface to the next with a large degree of bend and splay distortions occurring in the ...
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Elastic constants and dynamics in nematic liquid crystals
... A nematic liquid crystal phase can occur between the solid and the liquid phase for elongated or disk-shaped ...a nematic phase, the centres of mass of the molecules have no long-range order; ...
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Global defect topology in nematic liquid crystals
... of nematic textures for a general domain with weak anchoring boundary conditions and arbitrary defect set in terms of twisted cohomology, and give an explicit computation for the case of knotted and linked defects ...
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Condensation of free volume in structures of nematic and hexatic liquid crystals
... novel liquid crystalline mate- rials composed of a 4-(4-alkylcyclohexyl)phenyl benzo- ate mesogenic unit and featuring one of two highly branched terminal chains (2,4,4-trimethylpentyloxy or ...enantiotropic ...
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Field-induced refractive index variation in the dark conglomerate phase for polarization-independent switchable liquid crystal lenses.
... situation the refractive index is uniform in the liquid crystal layer with a refractive index of 1.615. The induced focal power is calculated to be +20 D through an analysis of the emergent wave front, which is in ...
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Rotational interaction of topological defects in planar nematic liquid crystals.
... The method seems to assume that a defect must have some minimal impact radius and some maximal amount of distortion. These assumptions seem fair but it is not clear what the sizes must be for the impact radius or the ...
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Optical Properties of Aligned Nematic Liquid Crystals in Electric Field
... the liquid crystals (LC) is very complex and their aligned surface is included the important fac- tors such as van der Waals, dipolar and steric interactions, hydrogen and chemical bonding and surface ...
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Competing alignments of nematic liquid crystals on square patterned substrates
... A theoretical analysis is presented of a nematic liquid crystal confined between substrates patterned with squares that promote vertical and planar alignment. Two approaches are used to elucidate the ...
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Phase separation effects and the nematic-isotropic transition in polymer and low molecular weight liquid crystals doped with nanoparticles
... heat measured in the two di ff erent copolymer LCs as well as in a LMW LC doped with quantum dot NPs. One notes that in the case of both the polymer and LMW LCs, the whole domain of NP concentrations, considered ...
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Computational fluid dynamics for nematic liquid crystals
... as liquid crystals and polymers is very challenging because of the altered structure of the flow equation: the underlying Navier–Stokes problem contains additional terms representing the interaction between ...
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Elasticity Tensors in Nematic Liquid Crystals
... in nematic liquid crystals can be described by tensors, and how these tensors can be represented using the director components and the Kronecker and Levi-Civita ...
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