Doctor of Sciences in Physics and Mathematics, Professor, Corresponding Member of the National Academy of Sciences of Ukraine, Honored Science and Engineering Worker of Ukraine, two-time laureate of the State prize of Ukraine.
Tomchuk Petro Mykhailovych.
tel. +38 (044) 525 07 66 email
Main fellows
18 employees, 5 PhDs/doctors of sciences, 10 PhDs/candidates of sciences.
Chumak Olexander Deputy Head of the Department, PhD, Doctor of Sciences in Physics and Mathematics, Chief Research Fellow,
+38(044) 525 63 33 chumak@iop.kiev.ua
Pergamenshchik Victor PhD, Doctor of Sciences in Physics and Mathematics, Leading Research Fellow
+38(044) 524 04 96
Rozhkov Serhiy PhD, Doctor of Sciences in Physics and Mathematics, Leading Research Fellow
+38(044) 525 79 94 rozhkov@iop.kiev.ua
Shenderovskyi Vasyl PhD, Doctor of Sciences in Physics and Mathematics, Leading Research Fellow
+38(044) 525 07 77 schender@iop.kiev.ua
Starkov Vyacheslav PhD, Doctor of Sciences in Physics and Mathematics, Leading Research Fellow
+38(044) 525 79 94 starkov@iop.kiev.ua
Kondrachuk Alexander PhD, Candidate of Sciences in Physics and Mathematics, Senior Research Fellow
+38(044) 525 08 23 kondr@kondr.kiev.ua
Krasnoholovets Volodymyr PhD, Candidate of Sciences in Physics and Mathematics, Senior Research Fellow
+38(044) 525 79 94 krasnoh@iop.kiev.ua
Lukyanets Serhiy PhD, Candidate of Sciences in Physics and Mathematics, Senior Research Fellow
+38(044) 524 04 96 lukyan@iop.kiev.ua
Semenov Andriy PhD, Candidate of Sciences in Physics and Mathematics, Senior Research Fellow
+38(044) 524 04 96 sem@iop.kiev.ua
Tarasenko Alexander PhD, Candidate of Sciences in Physics and Mathematics, Senior Research Fellow
Bondarenko, Victor PhD, Candidate of Sciences in Physics and Mathematics, Research Fellow
Chernyshuk, Stanislav PhD, Candidate of Sciences in Physics and Mathematics, Research Fellow
+38(044) 524 04 96 stasubf@gmail.com
Gandzha Ivan PhD, Candidate of Sciences in Physics and Mathematics, Research Fellow
+38(044) 525 79 94 gandzha@iop.kiev.ua
Levshin Alexey PhD, Candidate of Sciences in Physics and Mathematics, Research Fellow
+38(044) 525 08 23 a.levshin@iop.kiev.ua
Uzunova Vera Junior Research Fellow
+38(044) 524 04 96
Snihyr Anna Leading Engineer
+38(044) 525 07 66
Major research areas
Physics of low-dimensional systems:
interaction of electromagnetic radiation with matter; optical emission, optoacoustic properties, electron-lattice energy exchange in small metal particles, island films, and metallic particles in dielectric matrices;
theory of intermolecular chains with hydrogen bonds: proton transport along molecular chains; effects of multi-particle tunneling and transport in molecular chains;
macroscopic quantum tunneling in a system of hydrogen sublattices;
adatoms and surface systems: diffusion in ordered adatom structures on a crystalline surface;
diffusion under the conditions of first-order phase transitions, tracer diffusion;
kinetic processes, statistical description of systems with interaction, pattern formation in condensed matter;
nanoelectronics.
Liquid crystals theory: pattern formation, mixtures and suspensions.
Quantum optics:
cavity QED;
quantum measurement theory;
nonclassical properties of quantum states;
theory of quantum light in the turbulent atmosphere.
Nonlinear theory of oscillations and waves.
Mathematical modeling in the physics of mechanoreceptors.
Nonlinear mathematical models and methods of solution of nonlinear and ill-posed problems in laser physics.
Significant results Main achievements in recent years
theory of absorption and emission by small metal particles and their assemblages (island films); peculiarities of electron-lattice energy exchange in metal nanoparticles;
theory of diffusion in a system of strongly interacting adatoms: mass transfer due to migration of defects in ordered adatom structures, migration at undercritical temperatures in the 2D lattice-gas system accompanied by droplet ripening;
theoretical description of dissipative Williams domains in a two-frequency electric field;
inclusion of the divergent K13 term in the elasticity theory of spatially oriented liquid crystals;
theory of the effective interaction of micro- and macrodopands in a nematic medium;
theory of spatially inhomogeneous many-particle systems;
theory of high-Q cavities with unwanted absorption and scattering;
theory of the propagation of quantum light through a turbulent atmosphere;
theory of the transition to multiphoton relaxation of interacting atoms and the amplification of the superradiance effect;
mathematical model of a gravisensing system;
new wave solutions to the canonical model of hydrodynamics;
new technique for the construction of nonlinear evolution equations, generalization of high-order nonlinear Schrodinger equations;
mathematical models of multiple-beam laser models.
Most important achievements in the department history:
1944–1950. Theory of polarons (Pekar S.I.);
1945–1953. Foundations of the theory of excitons in molecular crystals (Davydov O.S.);
1960–1975. Theory of kinetic and fluctuation processes in nonequilibrium electron-phonon systems for semiconductors with different band structures and with the prevailing role of electron-electron (hole-hole) interactions. Kinetic coefficients, fluctuation characteristics, and cross-sections of wave scattering by fluctuations were investigated depending on carrier heating degree and band structure peculiarities for typical semiconductors. Theory for anisotropic and nonparabolic semiconductor structures (Tomchuk P.M., Chumak O.O., Shenderovskyi V.A., partially with Dykman I.M. [Institute of Semiconductors]);
1967–1977. Theory of the pinch effect in a semiconductor plasma and the oscillistor theory on the basis of multivalley semiconductors (Vladimirov V.V., Gorshkov V.M., Schedrin A.I.).
1969–1970. Theory of intrinsic defect mechanism of conduction and conduction self-compensation in ion semiconductors (Vinetskyi V.L.).
1972–1977. Kinetic theory of laser generation in spectrally inhomogeneous solid bodies (Mashkevich V.S., Godenko L.P.).
1976–1979. Band model of the recording of dynamic holograms in photorefractive crystals, which provided a basis for the majority of studies in dynamic holography (Vinetskyi V.L., Kukhtarev N.V.).
1978–1981. Theoretical prediction and experimental confirmation of the existence of magnetostatic solitons in ferromagnetic films and magnetoacoustic solitons in ferro- and antiferromagnetics (Lukomsky V.P.).
1982–1985. Theory of superlattices that are formed by hot electrons in a semiconductor in the field of coherent light beams. Theory of light diffraction on such superlattices. Theory of nonlinear propagation of infrared radiation in multivalley semiconductors under the conditions of superlattice formation (Tomchuk P.M., Chumak O.O., partially with Dykman I.M. [Institute of Semiconductors]).
1976–1981. Theory of injection-stimulated conversion of defects in light-emitting semiconductor structures (Lev B.I., Tomchuk P.M.).
1973–1980. A new method for describing the nonequilibrium fluctuations in a superconductor plasma that was used to construct the theory of electric noise in systems which cannot be described by the Boltzmann equation (quantum frequency range, quantizing electric or magnetic fields, strong interaction of carriers with resonance dopants) (Tomchuk P.M., Chumak O.O., Rozhkov S.S.).
1966–1968, 1985–1989. Concept of hot electrons in metallic nanoparticles that was used to construct the theory of nonlinear current-voltage characteristics and the theory of electron and photon emission from metallic island films under the current-induced or laser-induced heating of electrons (Tomchuk P.M.).
1980–1990. Theory of transport phenomena in low-symmetry and narrow-band semiconductors (Shenderovskyi V.A.).
1998–2003. Theory of diffusion in adsorptive systems with strong interaction (Chumak O.O.).
1990–1992, 2006–2007. Theory of surface and volume electron-lattice energy exchange in metallic nanoparticles (Bilotsky Ye.D., Tomchuk P.M.).
1984–2003. Theory of proton conduction in molecular chains with hydrogen bonds in which proton polarons serve as charge carriers. Theory of the coherent tunelling polarization in such chains (Krasnoholvets V.V., Lukyanets S.P., Tomchuk P.M.).
1990–2009. Revealing the optical bistability phenomenon in crystals with diffusion nonlinearity by the methods of computational physics. New mathematical models of the measurement tracts of experimental laser devices and new models of nonstationary multiple-beam interactions (Starkov V.M.).
1999–2003. Theory of permolecular structures in liquid crystals with macroclusters. Description of the known structures and prediction of some new structures induced by macro- and microdopants or boundary conditions in liquid crystals. (Lev B.I., Pergamenshchik V.M., Chernyshuk S.B.).
2001–2004. New wave solutions to the canonical model of hydrodynamics (Gandzha I.S., Lukomsky V.P.);
1986–1995, 2005–2008. A new method of the reduction of nonlinear evolution equations (Lukomsky V.P., during the last period together with Gandzha I.S.).
2001–2004. A new equation for describing the modulations of gravity waves on a fluid surface (high-order nonlinear Schrodinger equation) (Sedletsky Yu.V.).
1997–2007. Investigation of the dependence of optical properties of metallic nanoparticles on their shape. Revealing an abnormally high sensitivity of absorption in regard to the nanoparticle shape. The energy absorbed by the particles of equal volume but of different shape can differ by several orders of magnitude (Tomchuk P.M., Grigorchuk N.I. [Institute for Theoretical Physics]).
2002–2007. A phenomenological theory of high-Q optical and microwave cavities with allowance for absorption and scattering (Semenov A.A., Vasylyev D.Yu., Prof. Vogel W. [Universitaet Rostock, Germany], Prof. Welsch D.-G. and Khanbekyan M. [Friedrich-Schiller Universitaet Jena, Germany]).
2002–2008. Theory of angular dependences of hot electron emission in multivalley semiconductors (Tomchuk P.M.).
1995–2009. Mathematical models of physical processes in biological systems of spatial orientation and gravireception: computer 3D model of the otholite membrane, model of the dynamics of semicircular channels, model of the interaction of receptor cells with the surrounding gel (Kondrachuk A.V.).
Major publications 2009
Pergamenshchik V.M., Uzunova V.A., Colloid-wall interaction in a nematic liquid crystal: the mirror-image method of colloidal nematostatics, Phys. Rev. E, vol. 79, 021704 (2009) http://link.aps.org/doi/10.1103/PhysRevE.79.021704.
Starkov V.N., Semenov A.A., Gomonay H.V., Numerical reconstruction of photon-number statistics from photocounting statistics: regularization of an ill-posed problem, arXiv: 0903.1725v2 [quant-ph] (2009) http://arxiv.org/abs/0903.1725.
Lukomsky V.P., Gandzha I.S., Two-parameter method for describing the nonlinear evolution of narrow-band wave trains, Ukr. J. Phys., vol. 54, 207 (2009) http://ujp.bitp.kiev.ua/files/papers/540134p.pdf.
2008
Grigorchuk N.I., Tomchuk P.M., Theory of the absorption of a double ultrashort laser pulse by aspherical metallic particles of small size, Low Temp. Phys., vol. 34, 458 (2008) http://link.aip.org/link/?LTPHEG/34/458/1.
Bilotsky Y., Tomchuk P.M., Peculiarity of electron–phonon energy exchange in metal nanoparticles and thin films, Surface Science, vol. 602, 383 (2008) http://dx.doi.org/10.1016/j.susc.2007.10.023.
Lev B.I., Chernyshuk S.B., Yamamoto T., Yamamoto J., Yokoyama H., Photochemical switching between colloidal photonic crystals at the nematic-air interface, Phys. Rev. E, vol. 78, 020701(R) (2008) http://link.aps.org/doi/10.1103/PhysRevE.78.020701.
Pergamenshchik V.M., Lelidis I., Uzunova V.A., Stripe domains in a nearly homeotropic nematic liquid crystal: a bend escaped state at a nematic–smectic-A transition, Phys. Rev. E, vol. 77, 041703 (2008) http://link.aps.org/doi/10.1103/PhysRevE.77.041703.
Sedletsky Yu.V., The Hamiltonian formalism and a new type of modulation instability, J. Phys. A: Math. Theor., vol. 41, 035502 (2008) http://doi:10.1088/1751-8113/41/3/035502.
Jaeger R, Kondrachuk A.V., Haslwanter T., The distribution of otolith polarization vectors in mammals: comparison between model predictions and single cell recordings, Hearing Research, vol. 239, 12 (2008) http://dx.doi.org/10.1016/j.heares.2008.01.004.
2007
Gandzha I.S., Lukomsky V.P., On water waves with a corner at the crest, Proc. Roy. Soc. A, vol. 463, 1597 (2007) http://doi:10.1098/rspa.2007.1840.
Nych A.B., Ognysta U.M., Pergamenshchik V.M., Lev B.I., Nazarenko V.G., Musevic I., Skarabot M., Lavrentovich O.D., Coexistence of two colloidal crystals at the nematic-liquid-crystal–air interface, Phys. Rev. Lett., vol. 98, 057801 (2007) http://link.aps.org/doi/10.1103/PhysRevLett.98.057801.
Pergamenshchik V.M., Uzunova V.O., Coulomb-like interaction in nematic emulsions induced by external torques exerted on the colloids, Phys. Rev. E, vol. 76, 011707 (2007) http://link.aps.org/doi/10.1103/PhysRevE.76.011707.
Brodyn M.S., Starkov V.N., Methods of computational physics in the problem of mathematical interpretation of laser investigations, Quantum Electron., vol. 37, 679 (2007) http://dx.doi.org/10.1070/QE2007v037n07ABEH013493.
Berman G.P., Chumak A.A., Quantum effects of a partially coherent beam propagating through the atmosphere, Proc. of SPIE, vol. 6710, 67100M (2007) http://dx.doi.org/10.1117/12.732641.
Bilotsky Y., Tomchuk P.M., Size effect in electron-lattice energy exchange in small metal particles, Surface Science, vol. 600, 4702 (2006) http://dx.doi.org/10.1016/j.susc.2006.07.051.
Berman G.P., Chumak A.A., Photon distribution function for long-distance propagation of partially coherent beams through the turbulent atmosphere, Phys. Rev. A, vol. 74, 013805 (2006) http://link.aps.org/doi/10.1103/PhysRevA.74.013805.
Semenov A.A., Usenko V.C., Shchukin E.V., Lev B.I., Nonclassicality of quantum states and its application in quantum cryptography, Ukr. J. Phys. Rev., vol. 3, 151 (2006) [in Ukrainian] http://ujp.bitp.kiev.ua/files/rev_abstracts/R030203.pdf.
Tomchuk P.M., Peculiarities of the light absorption and emission by free electrons in multivalley semiconductors, Ukr. J. Phys., vol. 49, 681 (2004) http://ujp.bitp.kiev.ua/files/papers/490711p.pdf .
Smalyukh I.I., Chernyshuk S., Lev B.I., Nych A.B., Ognysta U., Nazarenko V.G., Lavrentovich O.D., Ordered droplet structures at the liquid crystal surface and elastic-capillary colloidal interactions, Phys. Rev. Lett., vol. 93, 117801 (2004) http://link.aps.org/doi/10.1103/PhysRevLett.93.117801.
Lukomsky V.P., Gandzha I.S., Cascades of subharmonic stationary states in strongly non-linear driven planar systems, Journal of Sound and Vibration, vol. 275, 351 (2004) http://dx.doi.org/10.1016/j.jsv.2003.06.029.
2003
Krasnogolovets V.V., Tomchuk P.M., Lukyanets S.P., Proton transfer and coherent phenomena in molecular structures with hydrogen bonds, Adv. Chem. Phys., vol. 125, 351 (2003) http://dx.doi.org/10.1002/0471428027.
Sedletsky Yu.V., The fourth-order nonlinear Schrodinger equation for the envelope of Stokes waves on the surface of a finite-depth fluid, JETP, vol. 97, 180 (2003) http://dx.doi.org/10.1134/1.1600810.
Starostenko V.I., Starkov V.N., On the results of the test of one V.N. Strakhov's hypothesis, Geofiz. Zhurn., vol. 25, 122 (2003) [in Russian].
Lev B.I., Chernyshuk S.B., Tomchuk P.M., Yakoyama H., Symmetry breaking and interaction of colloidal particles in nematic liquid crystals, Phys. Rev. E, vol. 65, 021709 (2002) http://link.aps.org/doi/10.1103/PhysRevE.65.021709.
Pergamenshchik V.M., Chernyshuk S.B., Full energy expression of a uniaxial nematic phase with spatially dependent density and order parameters: from microscopic to macroscopic theory, Phys. Rev. E , vol. 66, 051712 (2002) http://link.aps.org/doi/10.1103/PhysRevE.66.051712.
Lev B.I., Semenov A.A., Usenko C.V., and Klauder J.R., Relativistic coherent states and charge structure of the coordinate and momentum operators, Phys. Rev. A, vol. 66, 022115 (2002) http://link.aps.org/doi/10.1103/PhysRevA.66.022115.
Marchenko A., Lukyanets S., Cousty J., Adsorption of alkanes on Au(111): possible origin of STM contrast at the liquid/solid interface, Phys. Rev. B, vol. 65, 045414 (2002) http://link.aps.org/doi/10.1103/PhysRevB.65.045414.
Fedorovich R.D., Naumovets A.G., Tomchuk P.M., Electron and light emission from island metal films and generation of hot electrons in nanoparticles, Phys. Rep., vol. 328, 73 (2000) http://dx.doi.org/10.1016/S0370-1573(99)00094-0.
Lev B.I., Tomchuk P.M., Interaction of foreign macrodroplets in a nematic liquid crystal and induced supermolecular structure, Phys. Rev. E, vol. 59, 591 (1999) http://link.aps.org/doi/10.1103/PhysRevE.59.591.
Pergamenshchik V.M., Zumer S., Surface variation of the density and scalar order parameter and the elastic constants of a uniaxial nematic phase, Phys. Rev. E, vol. 59, R2531 (1999) http://link.aps.org/doi/10.1103/PhysRevE.59.R2531.
