Sign inversion of dielectric anisotropy in nematic liquid crystal by dye doping
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 dye the ...
9
Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites
... uid crystal (LC) nano-composites, i.e., LCs doped with metal, dielectric or semiconductor nanoparticles (NPs) of scales of 2–10 nm ...that doping of a ne- matic LC with even a small NP volume ...
9
Nematic liquid crystals doped with nanoparticles : phase behavior and dielectric properties
... Liquid crystal nanocomposites are considered to be extremely promising materials in which the properties of a liquid crystal (LC), used, for ex- ample, in display applications, are ...
41
Macroscopic biaxiality and electric field induced rotation of the minor director in the nematic phase of a bent core liquid crystal
... the core (bow director). The structure dynamically fluc- tuates and any external forces (i.e. those arising from homeotropic surface interactions) can suppress the helix formation. Rubbing the substrate, on the other ...
7
Study on the Polarization of Random Lasers from Dye Doped Nematic Liquid Crystals
... the dye molecules. Random lasers in or- ganic dye solutions can be highly linearly polarized by choosing a highly viscous solvent for the anisotropic ad- sorption of the dye molecules ...in ...
8
Continuum theory of biaxial nematic liquid crystals
... biaxial nematic systems may be aligned by the use of two crossed electric and magnetic fields, as subsequently investigated by Carlsson and Leslie [27], who managed to identify stable orientations of the directors ...
23
Tunable All Optical Switch Implemented in a Liquid Crystal Filled Dual-Core Photonic Crystal Fiber
... field, rubbing angle etc. [8–10]. In this paper, we propose an all optical switch implemented in a PCF comprising a central core region of soft glass (SF57) surrounded by holes infiltrated with E7 type nematic ...
11
Microlenses immersed in nematic liquid crystal with electrically controllable focal length
... The focal length measurements for the lens, as shown in fig. 3, were measured in two ways; directly, as described above and from the fringe analysis, as explained below. Clearly, the lenses are not behaving in accordance ...
6
Small amplitude oscillatory flows of nematic liquid crystal polymers
... molecule liquid crystals and the Leslie- Ericksen ...the nematic sample, as with steady pre- shear, would thereby not observe this sensitivity in storage ...
86
Capacitive Interdigital Sensor with Inhomogeneous Nematic Liquid Crystal Film
... Abstract—The performance of capacitive interdigital sensors involved with anisotropic and inhomogeneous nematic liquid crystal (LC) film is investigated. These sensors have potential applications in ...
13
Calculation of flexoelectric coefficients for a nematic liquid crystal by atomistic simulation
... Molecular dynamics simulations were performed using the DL–POLY program version 2.12. 45 The equations of mo- tion were integrated using the leapfrog algorithm with a time step of 2 fs. Bond lengths were constrained ...
10
Cyclometalation: 2,6 diphenylpyridine complexes of platinum
... Cholesteryl benzoate Liquid crystal classification Formation of a lyotropic mesophase Schematic representation of a thermotropic mesogen Schematic representation of nematic phase The dif[r] ...
196
Anisotropy of the elastic constants in SmC* liquid crystal films
... It is known that surface tension can induce a smectic film at the sur- face of an isotropic liquid crystal droplet, see for example Swanson et al. [1]. The molecules within the smectic layers can also ...
9
Thermal tuning of a thin-film optical filter based on porous silicon and liquid crystal
... The FS PSi film thus fabricated (see Fig. 2) was placed between two flat-parallel glass plates separated by 12 µm thick mylar stripes (2–3 µm thicker than the PSi film). Then the glass cell was infiltrated under vacuum ...
9
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 ...
13
IR-LD spectroscopy of benzil oriented as solution in nematic liquid crystal and melted polycrystalline solid sample
... in nematic liquid crystal and as melted poly- crystalline solid sample, using the orientation ...the crystal field effects in solid-state on the ...
5
Alignment of liquid crystal E7 in composite photonic crystals based on single crystal silicon
... The obtained value of S is significantly lower than that normally obtained for nematic LC (S = 0.67) contained between two windows coated with an orienting agent. The orientation of the LC director L can also be ...
8
Tunable All dielectric Metasurfaces: Fundamentals and Applications
... The tuning method when you change the properties of resonator material has several ad- vantages, which were described in the previous chapter. However, such method is difficult to implement for real applications. Using ...
127
Short range correlations seen in the nematic phase of bent core liquid crystals by dielectric and electro optic studies
... the dielectric technique at low frequencies, the electro-optic contrast spectroscopic [13], which is insensitive to the dc conductivity, is used ...the sign reversal of such that the condition E th = ...
5
A note on regularity criterion for 3D compressible nematic liquid crystal flows
... Here r is the density, u is the fluid velocity and d represents the macroscopic aver- age of the nematic liquid crystal orientation field, p(r) := ar g is the pressure with posi- tive constants a ...
5