832 citations · 6.2k across the 119 of their papers we have counts for
5 papers · 2 filters
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…