Перегляд за автором "Kovalenko, N.O."

Результати 1-20 з 20

CdSe charge obtaining for single crystals growth in alkaline solutions

Sofronov, D.S.; Mormilo, P.V.; Kovalenko, N.O.; Sofronova, E.M.; Matejchenko, P.V.; Bryleva, E.Yu.; Kapustnik, A.K.; Terzin, I.S. (Functional Materials, 2018)

Cadmium selenide charge obtaining is proposed by interaction of cadmium nitrate with selenium in alkaline solution in the presence of hydrazine. It is shown that irrespective of alkali concentration and synthesis time, ...
Laser ablation and photostimulated passivation of Cd₁₋ₓZnₓTe crystals

Zagoruiko, Yu.A.; Fedorenko, O.A.; Khristyan, V.A.; Kovalenko, N.O.; Mateychenko, P.V.; Dobrotvorskaya, M.V.; Poluboyarov, A.A. (Functional Materials, 2012)

Proposed is a new technology of passivation of Cd₁₋ₓZnₓTe crystals which comprises preliminary treatment of their surface by laser ablation aimed at removal of the disturbed surface-adjacent layer arising due to mechanical ...
Microhardness, laser damage threshold and SHG efficiency studies of potassium dihydrogen phosphate crystals doped with L-arginine amino acid

Kostenyukova, E.I.; Bezkrovnaya, O.N.; Kolybaeva, M.I.; Dolzhenkova, E.F.; Kovalenko, N.O.; Kanaev, A.; Pritula, I.M. (Functional Materials, 2016)

Potassium dihydrogen phosphate (KDP) single crystals doped with L-arginine (L-arg) amino acid (with a concentration of 0.3 to 1.4 wt. % in the solution) were grown onto a point seed by the temperature reduction method. The ...
Molar heat capacity and thermal conductivity of single crystals of ZnMgSe substitution solid solution

Kapustnik, A.K.; Zagoruiko, Yu.A.; Kovalenko, N.O. (Functional Materials, 2012)

Determined for the first time are the temperature dependences of thermal conductivity coefficient and molar heat capacity of single crystals of the substitution solid solution Zn₁₋ₓMgₓSe in 25-300°C temperature range. The ...
Novel material for active elements of lasers tunable in 4-5 mkm range: Fe²⁺:Zn₁₋ₓMgₓSe single crystals

Zagoruiko, Yu.A.; Kovalenko, N.O.; Fedorenko, O.A.; Gerasimenko, A.S. (Functional Materials, 2010)
Optical and luminescence properties of Er,Yb:YAG crystals grown by horizontal directional crystallization method

Nizhankovskyi, S.V.; Kozlovskyi, A.A.; Kovalenko, N.O.; Vovk, O.O. (Functional Materials, 2019)

The spectral properties of Er,Yb co-doped Y₃Al₅O₁₂ single-crystals grown for the first time by modified horizontal directional crystallization method in reducing atmosphere Ar+(CO, H₂) are reported in the paper. Optical ...
Photoluminescent properties of crystalline solid solution Zn₁₋ xMgxSe:Cr²⁺, a new active material for tunable IR lasers

Kovalenko, N.O.; Zagoruiko, Yu.A.; Fedorenko, O.O.; Kuzminov, E.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2010)

Considered in this work are the luminescent properties of new active material Zn₁₋xMgxSe :Cr²⁺ for tunable IR lasers. Measured in Zn₀.₇₅Mg₀.₂₅Se : Cr²⁺ is the spectrum of IR luminescence excitation, and shown is the ...
Photostimulated passivation of spectrometric CdZnTe detectors

Zagoruiko, Yu.A.; Kovalenko, N.O.; Fedorenko, O.A.; Komar, V.K.; Sulima, S.V.; Dobrotvorskaya, M.V.; Terzin, I.S. (Functional Materials, 2008)

A method is proposed for side surface passivation of spectrometric detectors based on Cd ₁₋ₓZn ₓTe solid solution. The influence of photostimulated passivation treatment on electrical and spectrometric properties of the ...
Physical properties of ZnSe-MgSe, ZnSe-CdS solid solutions and possibilities of their application in IR engineering

Zagoruiko, Yu.A.; Fedorenko, O.A.; Kovalenko, N.O.; Rom, M.A.; Mateychenko, P.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2000)

The vertical Bridgman method is used to obtain crystals of Zn₁₋x Mgx Se and ZnSe-CdS solid solutions (with 0.03 Ј x Ј 0.55 and Cd concentrations varying from 0.3 to 35 at.%, respectively). The composition of the samples ...
Single center study of ESBL-related strains of Enterobacteriaceae collected from clinical specimens of infants with the congenital heart disease using multiplex PCR amplification

Filonenko, G.V.; Talalaiev, O.S.; Kyryk, D.L.; Kovalenko, N.O.; Skorohod, I.M.; Salamanina, A.O. (Вiopolymers and Cell, 2017)

Aim. To study ESBL phenotypes, as well as to identify individual genotypes of β-lactamases and to study their prevalence among clinical strains of Enterobacteriaceae collected from children with the congenital heart disease. ...
Spectral properties of Er-doped yttrium aluminum garnet crystals grown by modified horizontal directional crystallization method

Nizhankovskyi, S.V.; Kozlovskyi, A.A.; Kovalenko, N.O.; Kryvonogov, S.I.; Siryk, Yu.V. (Functional Materials, 2018)

For the first time Er³⁺-doped yttrium aluminum garnet single crystals were grown by modified horizontal directional crystallization method in the reducing atmosphere Ar+(CO, H₂). The absorption and photoluminescence spectra ...
Strong thermostable interference coatings for IR optical elements

Zagoruiko, Yu.A.; Fedorenko, O.A.; Kovalenko, N.O.; Mateychenko, P.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2000)

Interference ZnO coatings for IR optical elements are obtained by the method of photothermal oxidation on the surface of crystalline ZnSe. Investigated are their mechanical and optical properties. The obtained oxide coatings ...
Temperature dependences of optical and piezoelectric characteristics of ZnMgSe single crystals

Zagoruiko, Yu.A.; Kovalenko, N.O.; Puzikov, V.M.; Fedorenko, O.A. (Functional Materials, 2010)
Thermally stable antireflection coatings for active elements of ZnMgSe:Cr²⁺-laser: preparation and properties

Khristyan, V.A.; Zagoruiko, Yu.A.; Kovalenko, N.O.; Mateychenko, P.V.; Sofronov, D.S. (Functional Materials, 2011)
Thermostable power sensors for transmitted continuous radiation of CO- and CO₂- lasers

Zagoruiko, Yu.A.; Kovalenko, N.O.; Fedorenko, O.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2000)

Thermostable power sensors for continuous and pulsed periodic laser IR radiation are developed. Manufactured are scale models for a multifunctional optical element which combines the functions of transmitting radiation ...
X-ray characterization of ZnSe single crystals doped with Mg

Fedorov, A.G.; Zagoruiko, Yu.A.; Fedorenko, O.A.; Kovalenko, N.O. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2001)

Doping of cubic ZnSe with certain impurities like Mg or Mn during crystal growth causes the increased contents of the hexagonal phase in the crystal or even the transformation to hexagonal wurtzite modification that possess ...
ZnMgSe:Cr²⁺ — a new active medium for lasers of middle IR

Zagoruiko, Yu.A.; Kovalenko, N.O.; Puzikov, V.M.; Fedorenko, O.A.; Basiev, T.T.; Doroshenko, M.E.; Osiko, V.V.; Jelinkova, H.; Koranda, P. (Functional Materials, 2009)

For the first time, laser generation is obtained in Zn₀.₇₅Mg₀.₂₅Se:Cr²⁺ single crystal. It is established that wavelength tuning in this laser can be realized in 2.2-2.6 μm region. The optical, luminescent and generation ...
ZnMgSe:Cr²⁺ single crystal: a novel material for active elements of tunable IR region lasers (rapid communication)

Zagoruiko, Yu.A.; Kovalenko, N.O.; Fedorenko, O.A.; Khristyan, V.A. (Functional Materials, 2008)

Obtained is a new thermostable material for active elements of tunable IR-lasers - Zn₁₋ₓMgₓSe:Cr²⁺, single crystals. The position of the absorption band of Cr²⁺ ions in wurtzite-type Zn₀.₇₉Mg₀.₂₁Se matrix is established.
Zn₁₋ₓMgₓSe single crystals as a functional material for optoelectronics

Zagoruiko, Yu.A.; Kovalenko, N.O.; Fedorenko, O.A.; Fedorov, A.G.; Mateychenko, P.V. (Functional Materials, 2005)

Structure, mechanical, optical, and electro-physical properties of single crystals of Zn₁₋ₓMgₓSe (0.03 < х < 0.55) solid solutions have been studied. The hexagonal Zn₁₋ₓMgₓSe single crystals (х > 0.12) have been found ...
ZnSe:Cr²⁺ laser crystals grown by Bridgman method

Komar, V.K.; Nalivaiko, D.P.; Sulima, S.V.; Zagoruiko, Yu.A.; Fedorenko, O.A.; Kovalenko, N.O.; Chugai, O.N.; Terzin, I.S.; Gerasimenko, A.S.; Dubina, N.G. (Functional Materials, 2009)

The melt growing of ZnSe crystals doped with Cr²⁺ for tunable mid-IR (2-3 μm) lasers has been described. A good quality crystal material with high homogeneity of both composition and physical properties has been obtained. ...

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