Electronic, optical and spectroscopic properties of N-dialkyl-imidazolium hexafluorophosphate (CMIM.PF) ionic liquid crystal molecules investigated by computational methods.

In this present work, we calculate the electronic, spectroscopic and nonlinear optical properties (NLO) of N-dialkyl-imidazolium hexafluorophosphate (CMIM.PF, where N = 10, 12, 14, 16, 18, 20) ionic liquid crystal molecules under the effect of alkyl chain length variation in cation moiety [CMIM] with fixed anion [PF]. CONTEXT: The majority of research on ionic liquid crystal to date has been focused on experiments, while theoretical studies on the optical properties of ionic liquid crystal have been extremely rare.

Molecular spectroscopy and electro-optical effect of I52 liquid crystal molecules studied under the influence of an external electric field (THz): a theoretical approach.

In the present work, we have calculated the electro-optical effect of the I52 (4-Ethyl-2-fluoro-4'-[2-(4-pentyl-cyclohexyl)-ethyl]-biphenyl) liquid crystal (LC) molecules under the influence of an external electric field in the THz frequency region. The electro-optical calculation has been performed with the help of a theoretical model which is developed for the organic compounds (liquid crystal), and also suitable for the terahertz (THz) device application. The theoretical model gives the electro-optical properties and correlates with experimental evidence.

Metamaterial-plasma based hyperbolic material for sensor, detector and switching application at microwave region.

Superconductor-plasma based hyperbolic material (SPHM) and meta-material-plasma based hyperbolic materials (MPHM) are the plasma based composite hyperbolic materials. Using the effective medium theory, the permittivity of SPHM and MPHM has been investigated. Perpendicular and parallel permittivities, real and imaginary part, versus normalized frequency have been analyzed with variation of filling fraction of composite hyperbolic material.

Tunable transmission of a nematic liquid crystal as defect in a 1D periodic structure of dielectric materials by orientation and re-orientation of liquid crystal molecules.

In this paper, we investigate tunable transmission characteristics of a one-dimensional periodic structure (1DPS), designed with periodic dielectric materials containing a nematic liquid crystal (NLC) as a defect layer, on the basis of orientation and re-orientation of LC molecules. The nonlinear differential equation for the director of the liquid crystal under the light field is solved numerically. The relation between the liquid crystal director and the intensity of the electromagnetic wave (EMW) is derived.