69 citations · 194 across the 21 of their papers we have counts for
21 papers
Magneto-optics of dichroic chiral photonic crystals: resonant diffraction transmission and higher-order reflections at grazing angles
A. H. Gevorgyan, A. A. Malinchenko, N. A. Vanyushkin +4
Magneto-optical effects in structured anisotropic media have attracted significant attention due to their potential in tunable photonic devices. In particular, dichroic cholesteric…
Local Diagnostics of the Density of Neutral Atoms in Plasma by Stimulated Rotation of Polarization Plane
Krzysztof Dzierzega, Michal Hnatic, Koryun B. Oganesyan +1
The polarization plane stimulated rotation angle of probe signal in the intense laser field in plasma is calculated. The estimates of the residual gas local density in a cesium pla…
Polarometric Method of Plasma Diagnostics
Koryun B. Oganesyan, Krzysztof Dzierdzega, Peter Kopcansky
The polarization plane rotation angle of probe signal in plasma is calculated. The estimates of the residual gas average density and the average magnitude of the magnetic field in…
An electron as a wave packet in the relativistic strophotron fel
M. Hnatic, P. Kopcansky, K. B. Oganesyan
We study the initial distribution of electrons in relativistic strophotron FEL over vibrational levels determined by the expansion coefficients. We show the quantity of the vibrati…
Effect of Anisotropy on Defect Mode Peculiariries in Chiral Liquid Crystals
A. H. Gevorgyan, K. B. Oganesyan
The effect of anisotropy on defect mode peculiarities in cholesteric liquid crystals is investigated. The problem is solved by Ambartsumians layer addition modified method. Two cas…
The cross sections for inelastic neutron scattering and radiative capture in the field of a light wave
E. A. Ayryan, A. H. Gevorgyan, I. V. Dovgan +1
The mixing of the levels of a compound nucleus in the field of a high-intensity light wave is considered. The cross sections for inelastic neutron scattering and radiative capture…
Absorption and Emission Dependences on Defect in CLC
A. H. Gevorgyan, K. B. Oganesyan, Yu. V. Rostovtsev +2
The influence of the defect position on absorption and emission in the cholesteric liquid crystal with an isotropic defect inside is studied. It is shown that for non-diffracting c…
Radiation of Channeled Positrons in Ultrasonic Wave
E. A. Ayryan, K. V. Ivanyan, M. Hnatic +4
In the classical approximation, we examine the problem of radiation by channeled positrons in the field of a longitudinal ultrasonic wave when the condition of parametric resonance…
Threshold behavior of free electron lasers without inversion
Dmitry N. Klochkov, Ashot H Gevorgyan, Koryun B. Oganesyan +4
The interaction between noncolinear laser and relativistic electron beams in static magnetic undulator has been studied within the framework of dispersion equations. For a free-ele…
Permanent Magnets Undulator for Terahertz FEL
M. L. Petrosyan, L. A. Gabrielyan, Yu. R. Nazaryan +5
The terahertz FEL ferromagnetic undulator has been created. The length of the undulator period is 9cm, number of the periods is 27. By means of selection and redistribution of magn…
Physics of Chiral Photonic Crystals with Defect
Ashot H. Gevorgyan, Koryun B. Oganesyan, Edik A. Ayryan +3
Specific features of the defect modes of cholesteric liquid crystals (CLCs) with an isotropic defect, as well as their photonic density of states, Q factor, and emission, have been…
Cholesteric liquid crystals with tunable defect inside
A. H. Gevorgyan, K. B. Oganesyan, E. A. Ayryan +2
Peculiarities of the defect modes of cholesteric liquid crystals (CLCs) with an isotropic/anisotropic defect inside are investigated. The influence of the defect layer thickness an…
Physics of Cold Atomic Fermi Gases
E. A. Ayryan, K. G. Petrosyan, A. H. Gevorgyan +2
We consider a cold two-species atomic Fermi gas confined in a trap. We combine the Hermitian coupling between the states (we assume them to be the states with different spins) with…
Electrons for Detection of Casimir Photons
Edik A. Ayryan, Karen G. Petrosyan, Ashot H. Gevorgyan +2
We propose a method for the detection of a dynamical Casimir effect. Assuming that the Casimir photons are being generated in an electromagnetic cavity with a vibrating wall (dynam…
X-Ray Radiation Generation in Heat Engines Using Electron Cooling
E. A. Ayryan, M. Hnatic, K. G. Petrosyan +3
We consider a relativistic quantum heat engine that goes through a thermodynamical cycle consisting of stages involving laser-assisted cooling of electrons and the generation of Xr…
Radiated Energy Calculation in FELWI
I. V. Dovgan, K. B. Oganesyan
The equations of particle motion in the FELWI are derived using Hamiltonian formalism. In small signal regime the uncoupled one dimensional phase equation is derived in the form of…
The Amplification in FEL with Inhomogeneous Magnetic Field
K. B. Oganesyan
The gain in a plane wiggler with inhomogeneous magnetic field is calculated.. It is shown, that the account of inhomogenity of the magnetic field leads to appearance of additional…
Mathematical Modeling of Graphite-to-Diamond Transition
E. M. Sarkisyan, K. B. Oganesyan, N. Sh. Izmailian +1
The energetic evaluations of graphite-to-diamond transition by electron irradiation are performed. The heat conduction problem is solved for the diamond synthesis when a pulse-peri…
Resonant Diffusive Radiation in Random Multilayered Systems
Zh. S. Gevorkian, J. Verhoeven
We have theoretically shown that the yield of diffuse radiation generated by relativistic electrons passing random multilayered systems can be increased when a resonant condition i…
Exact finite-size corrections for the square lattice Ising model with Brascamp-Kunz boundary conditions
N. Sh. Izmailian, K. B. Oganesyan, Chin-Kun Hu
Finite-size scaling, finite-size corrections, and boundary effects for critical systems have attracted much attention in recent years. Here we derive exact finite-size corrections…
Exact phase diagrams for an Ising model on a two-layer Bethe lattice
Chin-Kun Hu, N. Sh. Izmailian, K. B. Oganesyan
Using an iteration technique, we obtain exact expressions for the free energy and the magnetization of an Ising model on a two - layer Bethe lattice with intralayer coupling consta…