832 citations · 6.2k across the 119 of their papers we have counts for
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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…
Two-level masers as heat-to-work converters
A. Ghosh, D. Gelbwaser-Klimovsky, W. Niedenzu +4
Heat engines, which cyclically transform heat into work, are ubiquitous in technology. Lasers and masers, which generate a coherent electromagnetic field, may be viewed as heat eng…
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…
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…
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…
Composite Cell from Nematic and Cholesteric Liquid Crystals as an Rotator of Electrically Tunable Polarization Plane
A. H. Gevorgyan, K. B. Oganesyan, E. A. Ayryan +6
A liquid crystal optical device made of an optically anisotropic heterostructure is considered. The device consists of a cholesteric liquid crystal (CLC) layer sandwiched by two ph…
Nonlinear light propagation in cholesteric liquid crystals with a helical Bragg microstructure
Yikun Liu, Shenhe Fu, Xing Zhu +7
Nonlinear optical propagation in cholesteric liquid crystals (CLC) with a spatially periodic helical molecular structure is studied experimentally and modeled numerically. This per…
Small signal gain analysis for a wiggler with noncollinear laser wave and electron beam
A. I. Artemiev, D. N. Klochkov, G. Kurizki +2
The collective and single-electron amplification regimes of a non-collinear free electron laser are analyzed within the framework of dispersion equations. The small-signal gain and…
Free-Electron Lasers Without Inversion: Design of Two-Magnet Drift Region
A. I. Artemyev, Yu. V. Rostovtsev, S. Trendafilov +4
We propose a two-magnet design of a drift region for a free-electron laser without inversion (FELWI). By performing direct calculations of the phase shifts for electrons passing th…