Tatevik Sarukhanyan

Tatevik Sarukhanyan
Yerevan State University | YSU · Chair of Optics

PhD in physics

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9
Publications
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65
Citations

Publications

Publications (9)
Article
Full-text available
In this paper, we investigate the light absorption in helically structured photonic crystals (HSPCs) in an external static magnetic field in the case when the parameter of magneto-optical activity is a function of the light wavelength. We investigate and compare the spectra of absorption, the spectra of imaginary parts of wave vectors of forward pr...
Article
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Cholesteric liquid crystals (CLCs) with induced defects are one of the most prominent materials to realize compact, low-threshold and tunable coherent light sources. In this context, the investigation of optical properties of induced defect modes in such CLCs is of great interest. In particular, many studies have been devoted to the spectral contro...
Article
Full-text available
We investigated the features of the optical properties of magnetoactive cholesteric liquid crystals (CLCs) in an external static magnetic field. The boundary-value problem of light transmission through a finite layer of a magnetoactive CLC at normal light incidence and light reflection from a half-space is considered. We also investigated the evolu...
Article
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We have experimentally investigated lasing peculiarities in a cholesteric liquid crystal – dye-doped polymer layer – cholesteric liquid crystal three-layer wedge-cell system with different laser dye concentration changing pumping energy. It was theoretically and experimentally shown that there are photonic defect modes in cholesteric photonic bandg...
Article
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In our paper, the magneto-optical properties of a dichroic cholesteric liquid crystal layer with large values of magneto-optical parameter g and low values of dielectric permittivity were investigated. The solutions of the dispersion equation and their peculiarities were investigated in detail. The specific properties of reflection, transmission, a...
Article
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Spectral properties of the three-layered wedge-cell system of two identical cholesteric layers with an isotropic defect (dye-doped polymer layer) between them were investigated experimentally and theoretically. It was shown that multiple defect modes can be observed in this kind of system's photonic bandgap which widen the application range of ment...
Article
Full-text available
Oblique propagation of light through a planar layer of a cholesteric liquid crystal (CLC) is solved by Ambartsumian’s modified layer addition method. Two cases are considered, namely, the case when dielectric boundaries have a minimum influence on light transmission and the case when the CLC layer is in a vacuum. It is shown that in the first case...

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