24 citations · 160 across the 28 of their papers we have counts for
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The Effect of Defect Layer on Lasing in Cholesteric Liquid Crystal
A. H. Gevorgyan, K. B. Oganesyan, N. Sh. Izmailian +9
The photonic density of states (PDS) of eigen polarizations (EPs) in cholesteric liquid crystal (CLC) cells with a defect layer inside are calculated. The dependences for the PDS a…
The Influence of Absorption and Gain on Photonic Density of States
A. H. Gevorgyan, K. B. Oganesyan, N. Sh. Izmailian +8
The photonic density of states (PDS) of the eigen polarizations (EPs) in cholesteric liquid crystal (CLC) cells are calculated. The exact analytic expressions for the reflection an…
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…
Polarization Properties of the Cholesteric Liquid Crystals
A. H. Gevorgyan, M. Z. Harutyunyan, K. B. Oganesyan +5
In the present paper, we investigate the polarization properties of the cholesteric liquid crystals (CLCs) with an isotropic/anisotropic defect inside them. Possibilities of amplif…
Radiation Peculiarities in Chiral Photonic Crystals
A. H. Gevorgyan, K. B. Oganesyan, E. A. Ayryan +2
The peculiarities of defect modes and reflection spectra of chiral photonic crystals (CPC) with an isotropic defect for various thicknesses of the defect layer was investigated. Th…
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…