Перегляд за автором "Voitsekhivska, O.M."

Результати 1-18 з 18

Active conductivity of plane two-barrier resonance tunnel structure as operating element of quantum cascade laser or detector

Tkach, M.V.; Seti, Ju.O.; Matijek, V.O.; Voitsekhivska, O.M. (Condensed Matter Physics, 2011)

Within the model of rectangular potentials and different effective masses of electrons in different elements of plane two-barrier resonance tunnel structure there is developed a theory of spectral parameters of quasi-stationary ...
Confined and interface phonons in combined cylindrical nanoheterosystem

Makhanets, O.M.; Voitsekhivska, O.M.; Gryschyk, A.M. (Condensed Matter Physics, 2006)

The spectra of all types of phonons existing in a complicated combined nanoheterosystem consisting of three cylindrical quantum dots embedded into the cylindrical quantum wire placed into vacuum are studied within the ...
Electron- and hole-phonon interaction in quantum dot embedded into semiconductor medium (GaAs/AlxGa₁₋xAs)

Tkach, M.V.; Mikhalyova, M.Y.; Voitsekhivska, O.M.; Fartushinsky, R.B. (Condensed Matter Physics, 2001)

The analytical and numerical calculations of electron and hole spectra renormalised by L- and I-phonons taking into account the configurational interaction are performed for the QD embedded into semiconductor medium exemplified ...
Electron spectrum in conﬁned cylindrical nanoheterosystem with ﬁnite depth of potential well

Holovatsky, V.A.; Voitsekhivska, O.M.; Mikhalyova, M.J.; Tkach, M.M. (Condensed Matter Physics, 2000)

Electron spectrum in cylindrical quantum dot HgS embedded into ZnS medium is calculated using the variational method with variational parameter in Hamiltonian. The dependence of energy spectrum on the quantum well ...
Energy spectrum of localized quasiparticles renormalized by multi-phonon processes at finite temperature

Tkach, M.V.; Pytiuk, O.Yu.; Voitsekhivska, O.M.; Seti, Ju.O. (Condensed Matter Physics, 2017)

The theory of renormalized energy spectrum of localized quasi-particle interacting with polarization phonons at finite temperature is developed within the Feynman-Pines diagram technique. The created computer program effectively ...
Evolution of quasistationary electron spectrum in open spherical quantum dot

Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M. (Condensed Matter Physics, 2008)

The evolution of electron quasistationary spectrum in open spherical quantum dot is under study within the effective mass and rectangular potential model. Within the framework of the S-matrix model the exact solution of ...
Exciton spectrum in multi-shell hexagonal semiconductor nanotube

Makhanets, O.M.; Gutsul, V.I.; Tsiupak, N.R.; Voitsekhivska, O.M. (Condensed Matter Physics, 2012)

The theory of exciton spectrum in multi-shell hexagonal semiconductor nanotube is developed within the effective masses and rectangular potentials approximations using the method of effective potential. It is shown that ...
Generalized method of Feynman-Pines diagram technique in the theory of energy spectrum of two-level quasiparticle renormalized due to multi-phonon processes at cryogenic temperature

Tkach, M.V.; Pytiuk, O.Yu.; Voitsekhivska, O.M.; Seti, Ju.O. (Condensed Matter Physics, 2018)

Theory of the spectrum of localized two-level quasi-particle renormalized due to interaction with polarization phonons at cryogenic temperature is developed using the generalized method of Feynman-Pines diagram technique. ...
Intensities of quantum transitions in hexagonal nanotubes within the exciton spectral range

Makhanets, O.M.; Tsiupak, N.R.; Voitsekhivska, O.M. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2012)

The theory of exciton spectrum and intensities of interband quantum transitions in multi-shell hexagonal semiconductor nanotube is developed within the effective masses and rectangular potentials approximations using Bethe ...
Non-perturbation theory of electronic dynamic conductivity for two-barrier resonance tunnel nano-structure

Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M. (Condensed Matter Physics, 2011)

The non-perturbation theory of electronic dynamic conductivity for open two-barrier resonance tunnel structure is established for the first time within the model of rect angular potentials and different effective masses ...
Optical properties of GaAs/AlxGa1-xAs/GaAs quantum dot with off-central impurity driven by electric field

Holovatsky, V.A.; Yakhnevych, M.Ya.; Voitsekhivska, O.M. (Condensed Matter Physics, 2018)

The effect of a constant electric field and donor impurity on the energies and oscillator strengths of electron intraband quantum transitions in double-well spherical quantum dot GaAs/AlxGa1−xAs/GaAs is researched. The ...
Optimization of quantum cascade laser operation by geometric design of cascade active band in open and closed models

Tkach, M.V.; Seti, Ju.O.; Boyko, I.V.; Voitsekhivska, O.M. (Condensed Matter Physics, 2013)

Using the effective mass and rectangular potential approximations, the theory of electron dynamic conductivity is developed for the plane multilayer resonance tunnel structure placed into a constant electric field within ...
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models

Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M.; Pytiuk, O.Yu. (Condensed Matter Physics, 2016)

Using the Feynman-Pines diagram technique, the energy spectrum of localized quasi-particles interacting with polarization phonons is calculated and analyzed in the wide range of energies at the finite temperature of the ...
Properties of interface phonon spectra in complicated cylindrical nanosystem

Voitsekhivska, O.M.; Gryschyk, A.M. (Condensed Matter Physics, 2007)

The spectra of two types of interface phonons (top and side optical) are studied within the framework of dielectric continuum model for combined nanoheterosystems consisting of semiconductor cylindrical quantum dots inside ...
Quasi-stationary states of electrons interacting with strong electromagnetic field in two-barrier resonance tunnel nano-structure

Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M. (Condensed Matter Physics, 2012)

An exact solution of non-stationary Schrodinger equation is obtained for a one-dimensional movement of electrons in an electromagnetic field with arbitrary intensity and frequency. Using it, the permeability coefficient ...
Renormalized energy of ground and first excited state of Fröhlich polaron in the range of weak coupling

Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M.; Pytiuk, O.Yu. (Condensed Matter Physics, 2015)

The partial summing of infinite range of diagrams for the two-phonon mass operator of polaron described by Frohlich Hamiltonian is performed using the Feynman-Pines diagram technique. The renormalized spectral parameters ...
Spectral parameters of electron in multi-shell open semiconductor nanotube

Makhanets, O.M.; Kuchak, А.І.; Gutsul, V.I.; Voitsekhivska, O.M. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2015)

The spectral parameters (resonance energies and resonance widths) of electron in multi-shell open cylindrical semiconductor nanotube are theoretically investigated within the effective mass and rectangular potentials model ...
The effect of interface phonons on operating electron states in three-barrier resonant tunneling structure as an active region of quantum cascade detector

Tkach, M.V.; Seti, Ju.O.; Grynyshyn, Y.B.; Voitsekhivska, O.M. (Condensed Matter Physics, 2014)

The Hamiltonian of electrons interacting with interface phonons in three-barrier resonant tunneling structure is established using the first principles within the models of effective mass and polarization continuum. Using ...

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Перегляд за автором "Voitsekhivska, O.M."

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