We have investigated the electronic and optical properties of AlN hexagonal nanosheets under different kinds of strains, using the band structure results obtained through the full potential linearized augmented plane wave method within the density functional theory. The results show that 10% uniaxial strain along the zig-zag direction induces an indirect to direct band-gap transition. Th...

Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...

A Rectangular Dielectric Resonator Antenna (RDRA) is theoretically analyzed using the Conventional Dielectric Waveguide Model (CDWM), numerically simulated using the High Frequency Structure Simulator (HFSS) based on the Finite Element Method (FEM) software package and experimentally investigated with the consideration of the fundamental mode TE 111. Antenna parameters under investigation inclu...

An attempt has been made to study the impact of calcium carbonate on soil dielectric properties. The dielectric constant (ε') and dielectric loss (ε'') of soil with increasing percentage of calcium carbonate are measured at 7.0 GHz. These measurements are carried at room temperature. The J-band microwave setup with slotted section and a crystal detector is used for measurements. The two point m...

The work is focused on thin film technologies especially on sputtering of dielectric thin film layers. The set of thin film capacitors was created on silica glass substrate. Aluminum electrodes of separated capacitors are deposited by method of vacuum evaporation. The AlN dielectric layer was prepared by reactive high frequency sputtering from aluminum target in nitrogen atmosphere. Dielectric ...

We define the dielectric constant (susceptibility) that should enter the Maxwell boundary value problem when applied to microscopic dielectric interfaces polarized by external fields. The dielectric constant (susceptibility) of the interface is defined by exact linear-response equations involving correlations of statistically fluctuating interface polarization and the Coulomb interaction energy...

Abstract—Dielectric ceramic samples in the BaO-Re2O3-TiO2 ternary system were synthesized with structural formula Ba2xRe4+2x/3Ti8O24 where Re= rare earth metal and Re= Sm and La where x varies from 0.0 to 0.6 with step size 0.1. Polycrystalline samples were prepared by the conventional solid state reaction technique. The dielectric, electrical and impedance analysis of all the samples in the fr...

Temperature-dependent Raman and dielectric measurements have been carried out on (C2H5NH3)2CdCl4 single crystals. Raman studies reveal the presence of two structural phase transitions below room temperature at 216 K and 114 K. The phase transitions are marked by anomalies in temperature dependence of wave-number and full width half maximum (FWHM) of several vibrational modes. The transitions ar...

The effects of a two-dimensional periodic dielectric substrate on the performance of a microstripfed wide slot antenna are investigated. The microstrip-feed and wide slot is placed on opposite sides of the periodic dielectric substrate. Method of Moment calculations using volume integral equations is employed to determine the effects of the substrate. It is proposed that by introducing a period...