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We found the full analytical solution of the semiclassical model, described the stationary profile of the electric field in the miniband semiconductors, subjected to the DC voltage. The analysis of obtained solution shown the three different types of the field distribution, taken place in the semiconductor depending on the emitter current-field characteristics. Among the observed profiles we found...
In this work, we show that the use of terahertz laser radiation combined with magnetic field provides an opportunity to detect high mobility surface electron states in (Bi1−xInx)2Se3 solid solutions being either in topological insulator (TI) (x < 0.05) or trivial semiconductor (TS) (χ > 0.06) phase. It is demonstrated that in TI Bi2Se3 the photoelectromagnetic effect amplitude is defined by...
The terahertz response of amorphous materials is investigated using a combination of experimental terahertz timedomain spectroscopy and low-frequency Raman scattering experiments and theoretical ab initio density functional theory and molecular dynamics calculations. The role of intermolecular interactions on the relaxation dynamics is explored, with specific attention paid to the temperature-dependent...
Silicon-doped InP is grown on top of semi-insulating iron-doped and sulfur-doped InP substrates by metal-organic vapor phase epitaxy (MOVPE), and the growth parameters are adjusted to obtain various free carrier concentrations from 1.05×1019 cm−3 up to 3.28×1019 cm−3. Mid-infrared (IR) reflection spectra of the samples with different carrier concentrations are used to retrieve pertaining dielectric...
Radially polarized intense terahertz (THz) radiation is measured experimentally behind a thin foil irradiated by ultrashort relativistic intense laser pulse of ultrahigh contrast. As the target thickness is reduced from 30 to 2 μm, the energy of the THz emission increases dramatically, which even reaches up to 10.5 mJ per pulse, corresponding to energy conversion efficiency of 1.7%. This efficient...
In this paper we calculate the complex permittivity of a crystalline material supported in a non-absorbing medium. To do this we have developed a software package, PDielec, which post processes solid state quantum mechanical and molecular mechanical calculations of the phonons and dielectric response of the crystalline material. Using an effective medium approximation, the package calculates the internal...
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