Publications on the project |
048 Optically induced anisotropy of surface plasmons in spherical nanoparticles |
Authors: | Igor Dmitruk, Ivan Blonskyi, Ihor Pavlov, Oleg Yeshchenko, Alexandr Alexeenko, Andriy Dmytruk, Petro Korenyuk, Viktor Kadan, Nikolai Zubrilin. | |
Summary: | Red shift and splitting of surface plasmon band in absorption spectra of copper nanoparticles incorporated in silica matrix have been observed under irradiation by intense femtosecond laser pulse with power density 1011–1012 W/cm2. These phenomena are interpreted as a result of change of dielectric constant of the silica matrix and its induced anisotropy due to optical Kerr effect in the electric field of light wave enhanced in the vicinity of the metal nanoparticles. Suggested interpretation is supported by the results of pump-probe measurements in different polarizations. After the end of pump pulse plasmon shifts to the blue side. This blue shift is also polarization dependent and it can be attributed to formation of plasma in silica around nanoparticle. | |
Keywords: | plasmon, nanoparticle, field enhancement, Kerr effect | |
Edition: | Phys. Rev. B | | | 2010,
033401-1033401-4,English |
048 Femtosecond filamentation in chalcogenide glasses limited by two-photon absorption |
Authors: | Ivan Blonskyi, Viktor Kadan, Oleh Shpotyuk, Mihail Iovu, Ihor Pavlov | |
Summary: | Filamentation of 800 nm femtosecond laser pulses in the conditions of strong two-photon absorption was first directly observed in As4Ge30S66 chalcogenide glass, this effect being accompanied by increase in the pulse spectrum width from 8.5 to 11 nm and its modulation indicating the pulse temporal splitting. In contrast, there was no filamentation and pulse spectrum widening in stoichiometric As2S3 glass. The nonlinear figure of merit was shown to be as high as 0.5 and only ∼0.1 in glassy As4Ge30S66 and As2S3, respectively. | |
Keywords: | Femtosecond laser pulses; Kerr effect; Filaments; Chalcogenide glass; Self-focusing | |
Edition: | Optical Materials | | | 2010,
p. 1553-1557,English |
048 Polarization measurements in femtosecond time domain. XX International School-Seminar of Galyna Puchkovska "Spectroscopy of molecules and crystals" |
Authors: | I.M. Dmitruk, I.V. Blonskyi, A.M. Dmytruk, P.I. Korenyuk, V.M. Kadan, N.G. Zubrilin | |
Summary: | Polarization measurements are among the most precise and sensitive in optics. A number of fine physical effects as well as analytic techniques are based on the variations of polarization of light. an example of time-resolved polarization measurements performed in pump-probe experimental setup is presented. another interesting application of polarization technique in femtosecon time domain is optical Kerr shutter for time-resolved luminescence measurements. | |
Keywords: | femtosecond, polarization measurements | |
Edition: | XX International School-Seminar of Galyna Puchkovska "Spectroscopy of molecules and crystals"., Beregove, Crimea, Ukraine, p. 281 | | | 2011,
281,English |
048 New optical effects that accompany the propagation of powerful femtosecond pulses in kerr media |
Authors: | Blonskyi I.V., Kadan V.M., Korenyuk P.I., Shpotyuk O.Y., Iovu M. | |
Summary: | | |
Keywords: | | |
Edition: | V-Ukrainian conference on physics of semiconductors, Uzhgorod, 9-15 october 2011 | | | 2011,
,Ukrainian |
048 Excitation effects and luminescence stability in porous SiO2:C layers |
Authors: | Andriy Vasin, Andriy Rusavsky, Alexei Nazarov, Vladimir Lysenko, Galyna Rudko, Yurii Piryatinski, Ivan Blonsky, Jarno Salonen, Ermei Makila, Sergii Starik | |
Summary: | White-light emitting porous SiO2:C layers on silicon wafers have been fabricated by oxidation of carbonized porous silicon. The study was focused mainly on the identification of the mechanism of light emission and photo-induced degradation. The effect of carbonization temperature and exposure to intense ultraviolet irradiation on the photoluminescence (PL) properties was studied by steady state and time-resolved PL measurements. Two types of photo-induced degradation phenomena were observed: reversible and irreversible. The irreversible degradation is suggested to be associated with photo-induced chemical interaction of light emitting material with atmospheric oxygen. It is demonstrated that irreversible degradation can be reduced by encapsulation of the light-emitting material. The structural configuration of light-emitting centers and mechanism of reversible degradation are discussed. | |
Keywords: | carbon incorporated silicon oxide;white luminescence | |
Edition: | Phys. Status Solidi A 209, No. 6, 1015-1021 | | | 2012,
1015–1021,English |
048 Вплив наночасток на фотостабільність та генераційні властивості полімерних лазерних елементів на органічних барвниках |
Authors: | Nehriyko AM, Bezrodnyi VI, Udovytska OG | |
Summary: | | |
Keywords: | | |
Edition: | Сборник научных трудов Y Международной научной конференции Функциональная база наноэлектроники, С.267, Харьков-Крым 2012 | | | 2012,
267,Ukrainian |
048 Optical properties of organic dyes introduced into the polyurethane matrix |
Authors: | Bezrodnyi VI, Kovalenko MS Kosyanchuk LF, Todosiychuk TT | |
Summary: | | |
Keywords: | | |
Edition: | | | | 2012,
30,Russian |
048 Noble metal nanoparticles as a tochstone for femtosecond plasmonics |
Authors: | I.Dmitruk, I.Blonskyi, A.Dmytruk, D.Alexyuk, O.Yeshchenko, P.Korenyuk, V.Kadan, M.Zubrilin, A.Alexeenko | |
Summary: | | |
Keywords: | | |
Edition: | 4th German-Ukrainian Symposium "Physics and Chemistry of Nanostructures and Nanobiotechnology" 18-20 September 2012, Ilmenau University of Technology | | | 2012,
74-75,English |
048 Transient absorption of gold nanorods induced by femtosecond laser irradiation |
Authors: | Y. Shynkarenko, A. Dmytruk, I. Dmitruk, I. Blonskyi, P. Korenyuk, C. Sonnichsen, A. Kotko | |
Summary: | Action of femtosecond laser irradiation on optical absorption of gold nanorods has been measured by pump-probe technique in spectral regions of both longitudinal and transverse modes of surface plasmons. Evolution of parameters of the plasmon absorption bands, namely, peak positions and band widths, after an impact of the pump pulse on water suspension of the nanorods has been revealed by advanced data processing, accounting for a chirp of "white continuum" of the probe pulse. Observed kinetics fits hot electron relaxation theory. Besides, a significant increase of cross-phase modulation in the spectral range of surface plasmon absorption band has been found. Irreversible nanorod shape transformation (aspect ratio change) has been observed after long term irradiation. Pump-probe measurements were performed at the Center for collective use of equipment "Femtosecond Laser Complex" of National Academy of Sciences of Ukraine. | |
Keywords: | Gold nanorods, pump-probe, femtosecond laser irradiation, cross-phase modulation | |
Edition: | Ukrainian Journal of Physics | | | 2013,
331-335,English |
048 Characterization of graphene layers by Kelvin probe force microscopy and micro-Raman spectroscopy |
Authors: | A.N. Nazarov, S. O. Gordienko, P. M. Lytvyn, V. V. Strelchuk, A. S. Nikolenko, A. V. Vasin, A. V. Rusavsky, V. S. Lysenko, and V. P. Popov, | |
Summary: | This paper considers a synthesis of graphene flakes on the Ni surface by vacuum thermal treatment of the “sandwich” a-SiC/Ni multilayer deposited on silicon wafer by magnetron sputtering technique. Lateral size of graphene flake is estimated to be about hundreds of microns while thickness estimated by Raman scattering varied from one to few layers. Atom force microscopy (AFM) is not able to detect graphene flakes in regime of surface topology examination due to large roughness of Ni surface. Employment of scanning Kelvin probe force microscopy (SKPFM) demonstrates a correlation of surface potential and graphene flakes visible by optical microscopy. Moreover, the SKPFM allows to detect the graphene layer even in case of absence of optical contrast from single graphene layer on nickel surface. Using of KPFM the potential differences between Ni and graphene is determined. | |
Keywords: | graphene;magnetron sputtering;micro-Raman spectroscopy;Kelvin probe force microscopy;atomic force microscopy | |
Edition: | Physica Status Solidi C | | | 2013,
1172-1175,English |
048 Graphene layers fabricated from the Ni/a-SiC bilayer precursor |
Authors: | A.N. Nazarov, A.V. Vasin, S.O. Gordienko, P.M. Lytvyn, V.V. Strelchuk, A.S.Nikolenko, A.S.Hirov, A.V. Rusavsky, V.P. Popov, and V.S. Lysenko | |
Summary: | This paper considers a synthesis of graphene flakes on the Ni surface by vacuum long and nitrogen rapid thermal treatment of the “sandwich” amorphous (a) SiC/Ni multilayer deposited on silicon wafer by magnetron sputtering technique. The lateral size of graphene flakes was estimated to be about hundreds of micrometers while the thickness estimated using Raman scattering varied from one to few layers in case of vacuum annealing. Rapid thermal annealing (RTA) in nitrogen ambient results in formation of multilayer graphene with surface covering up to 80%. The graphene layers synthesized on Ni during CVD process was used as reference samples. Atomic force microscopy (AFM) is not able to detect graphene flakes in regime of surface topology examination because of large roughness of Ni surface. Employment of scanning Kelvin probe force microscopy (SKPFM) demonstrates correlation of the surface potential and
graphene flakes visible in optical microscopy. Using the KPFM method, potential differences between Ni and graphene were determined. | |
Keywords: | graphene, a-SiC, magnetron sputtering, micro-Raman, AFM, scanning Kelvin probe force microscopy | |
Edition: | Semiconductor Physics, Quantum Electronics & Optoelectronics, V.16. - №4, P.322-330 | | | 2013,
322-330,English |
048 Investigations of photophysical and generation properties of active elements based on dyes in aliphatic polyurethane matrix |
Authors: | V.I. Bezrodnyi, A.M. Negryiko, G.V. Klishevich, M.S. Stratilat, L.F. Kosyanchuk, T.T. Todosiichuk | |
Summary: | A new polymer matrix based on aliphatic polyurethane was proposed and investigated for the development of laser active media for the tunable dye lasers. The polymer matrix was synthesized by the prepolymer method. The prepolymer, obtained from hexamethylene diisocyanate and oligodiethyleneglycol adipinate, was hardened by trimethylolpropane. The production method of the laser sandwich-like active media based on xanthene and pyrromethene dyes was described; their spectral, photophysical and generation characteristics were investigated. Significant increase in the beam strength of the polymer matrix, the growth in efficiency and stability of the active elements are observed due to the peculiarities of aliphatic polyurethane chemical structure. The main reason for the high photostability and operation lifetime of laser polyurethane-based active elements was shown to be the absence of reactive radicals. | |
Keywords: | Polyurethanes, Optical properties, Rhodamine 6G dye, Pyrromethene dye, Photostability, Solid state dye laser | |
Edition: | Journal of Polymer Research, 20, 246 | | | 2013,
246,English |
048 Influence of aliphatic polyurethane matrix on the spectral and photophysical characteristics of the dyes in the active laser elements |
Authors: | В.И Безродный, А.М. Негрийко, Г.В. Клишевич, Л.Ф. Косянчук, М.С. Стратилат, Т.Т. Тодосийчук | |
Summary: | | |
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Edition: | Proceedings of NAS of Ukraine, 7, 108 | | | 2013,
108,Russian |
048 Method of time-resolved luminescence studies by optical Kerr gate |
Authors: | I.M. Dmitruk, D.V. Aleksyuk, I.V. Blonskii, N.G. Zubrilin, A.M. Dmytruk, V.M. Kadan, P.I. Korenyuk, E.V. Shynkarenko | |
Summary: | | |
Keywords: | femtosecond, Kerr gate, luminescence | |
Edition: | Collective monography "Nanoscale systems and nanomaterials: studies in Ukraine", Kyiv, "Akademperiodyka" | | | 2014,
309-313,Russian |
048 Optical recording in copper-silica nanocomposite |
Authors: | Igor Dmitruk, Ivan Blonskiy, Petro Korenyuk, Viktor Kadan, Mykola Zubrilin, Andriy Dmytruk, Oleg Yeshchenko, Alexandr Alexeenko, Andriy Kotko | |
Summary: | The application of field enhancement effect, which takes place when light, interacts with surface plasmon, for optical recording has been suggested. Copper–silica nanocomposite demonstrates possibility of optical writing and erasing under irradiation by second harmonic (400 nm) and fundamental wavelength (800 nm) of femtosecond titanium–sapphire laser, respectively. | |
Keywords: | Optical recording, Plasmon Field enhancement, Nanocomposite | |
Edition: | Applied Surface Science | | | 2014,
66-68 ,English |
048 Formation of ultrafine structures on the surface of special alloys by plasma and laser radiation |
Authors: | ZA Duryagina, SA Bespalov, NG Zubrilin, VN Uvarov, TL Tepla, VY Pidkova, SA Ol'shevska | |
Summary: | | |
Keywords: | | |
Edition: | Collective monography "Nanoscale systems and nanomaterials: studies in Ukraine", Kyiv, "Akademperiodyka" | | | 2014,
405-411,Russian |
048 Manifestation of optical vortices on the surface of solids under irradiation with femtosecond laser pulses |
Authors: | N.G. Zubrilin, I.M. Dmitruk | |
Summary: | Quasi-periodic microstructures containing dislocations are formed on the surfaces of metals and semiconductors under irradiation with high-power femtosecond laser pulses. Interpretation of microstructures as a result of interference of the incident plane wave and surface waves leads to the logical conclusion about the relationship of dislocations in the interference fringes with optical vortices in surface wave. | |
Keywords: | laser processing, surface wave, optical vortex | |
Edition: | Semiconductor Physics, Quantum Electronics & Optoelectronics | | | 2014,
165-167,English |
048 Femtooptics of solid state kerr media |
Authors: | И.В. Блонский, А.Н. Дмитрук, И.Н. Дмитрук, Н.Г. Зубрилин, В.Н. Кадан, П.И. Коренюк, А.Э. Домбровский, Е.В. Шинкаренко, А.И. Ярусевич | |
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Edition: | Collective monography "Nanoscale systems and nanomaterials: studies in Ukraine", Kyiv, "Akademperiodyka" | | | 2014,
43-51,Russian |
048 Peculiarities of interactions between 6-aminophenalenone dye and polyurethane matrix |
Authors: | L.Kosyanchuk, T.Bezrodna, M.Stratilat, T. Todosiichuk | |
Summary: | Possibility for chemical interactions of 6-aminophenalenone dye with the components of reaction mixture at the polyurethane formation was shown by means of X-ray wide angle scattering, EPR and visible spectroscopy methods. This was also confirmed by IR-spectroscopy, identifying the products of the model reaction between 6-aminophenalenone and hexamethylene diisocyanate. Observed large Stokes shift gives prospects to use efficiently the polyurethane matrix with 6-aminophenalenone as an active element in dye lasers. | |
Keywords: | Polyurethane, 6-aminophenalenone, Spectral properties, Associates, Dye laser
| |
Edition: | J Polym Res | | | 2014,
564-571,English |
The events in the framework of the project |
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048 Dmitruk Іhor M.Candidates of sciences (PhD, physics & mathematics) Chief Scientific Officer +380445259968
048 Executant:Institute of Physics, Department of Physics and Astronomy, Section Physical, Engineering and Mathematics 3. Diagnostics of nanostructures Purpose: Expected results:Issue of new types of products: methods, theories Stage 1: Stage 2: Stage 3: Stage 4: Stage 5:
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