Abstract In response to the burgeoning interest in enhancing properties of liquid crystal composites, this research systematically explores intricate interplay between MBBA nematic crystals and ferroelectric barium titanate nanoparticles. The focus is modulating dielectric under temperature, frequency, an applied electric field. Nuanced insights into temperature-dependent behavior, parallel perpendicular component alterations, a nonlinear correlation nanoparticle concentration constant are...

A planar nematic liquid crystal cell (NLC) doped with spherical ferroelectric nanoparticles is considered. Polarisation of the are assumed to be along NLC molecules parallel and antiparallel director equal probability. The anchoring walls considered strong, while soft at surface supposed. Behaviour in presence a perpendicular electric field theoretically investigated. taken into account calculations. Freedericksz transition (FT) threshold found. Then, particles reorientations for fields...

In a nonuniform nematic liquid crystal director reorientation may take place as result of temperature gradient. We formulated two-dimensional model the gradient caused by light absorption Gaussian laser beam impinging normally on cell. Within this model, we calculated and subsequent optical nonlinearity crystal.

We theoretically studied the Rayleigh-Benard convection in homeotropic nematic liquid crystal cells due to absorption of a Gaussian light beam, which penetrates cell normally from above. It was shown that hydrodynamic motion crystals can be induced as result beam and consequently, lead significant director reorientation cells. The results easily measured experimentally.

A nematic liquid crystal cell doped with spherical ferroelectric nanoparticles is studied in the high frequency regime.Optical permittivity of host presence chained nanoparticles, birefringence and optical Freedericksz transition threshold suspension are discussed theoretically.The director reorientation due to simultaneous oblique incidence a light beam external applied magnetic field small approximation.Also, nonlinearity medium analytically calculated here.The obtained range supra-nonlinearity.

Surface tension gradients can cause mass transfer (Marangoni effect). We investigated thermocapillary in homeotropic oriented nematic liquid crystals. The heating process was performed with a Gaussian laser profile. upper surface of the cell is free and bottom has hard anchoring conditions. Upon assuming fluid incompressible, hydrodynamic equations that explain system shifts be derived from balance torques, Navier-Stokes heat equation. equation written for anisotropic area. problem existence...

We investigate the linear and nonlinear dispersion absorption properties of a weak probe field in slab doped with V-type atoms. The effect relative phase between applied fields on is discussed. It demonstrated that system phase-sensitive when spontaneously generated coherence (SGC) exists. effects coupling intensity, incoherent pump, difference Kerr nonlinearity are also presented.

The Freedericksz transition threshold is investigated in a homogeneously aligned carbon nanotube (CNT) doped liquid crystal (LC) planar cell. By neglecting the aggregate and bundle formation of CNTs low concentration CNT LC cell, reduction calculated theoretically. Flexoelectric polarisation tensorial expansion terms order parameter generalised Helfrich theory used to estimate flexoelectric coefficients mixture. Dipolar quadrupolar polarisations are studied It shown that doping changes...

In this paper, surface polaritons (SPs) at the interface of a semi-infinite homogeneous dielectric medium and onedimensional photonic crystal (PC) have been investigated theoretically.The PC is made alternate layers an isotropic ordinary graphene-based hyperbolic metamaterial layer.The effective approach has used to study layers, showing that they dispersion in certain frequency range THz region.The obtained results show structure some band gaps elliptical regions for both TE TM...