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  1. No Access

    Article

    Nonlinear response of photorefractive lithium tantalate and niobate at acoustic frequencies

    An amplification of the intensity of pump oscillations is observed experimentally at frequencies from 100 Hz to 1 kHz during photoinduced light scattering and holographic-type parametric scattering in photoref...

    P. A. Prudkovskii, O. V. Skugarevskii… in Journal of Experimental and Theoretical Ph… (1997)

  2. No Access

    Article

    Holographic-type parametric scattering: The universal character of the seed radiation

    It is concluded on the basis of experimentally obtained time dependences of the intensity of holographic-type parametric scattering induced by artificially produced seed radiation in a photorefractive lithium ...

    P. A. Prudkovskii, A. N. Penin in Journal of Experimental and Theoretical Physics Letters (1999)

  3. No Access

    Article

    Spatiotemporal self-organization upon two-wave mixing in a photorefractive medium

    Nonlinear dynamics of recording volume holographic gratings upon two-wave mixing in an inertial photorefractive media were studied. It is found that the space-time dependence of the grating diffraction efficie...

    P. A. Prudkovskii in Journal of Experimental and Theoretical Physics Letters (2003)

  4. No Access

    Article

    Phase transition in the generalized Ising-Kosterlitz-Thouless model

    The features of the phase transition are considered in a model that is a combination of the Ising and Kosterlitz-Thouless models. It is shown that one or two successive phase transitions may occur in such a sy...

    P. A. Prudkovskii in Journal of Experimental and Theoretical Physics Letters (2005)

  5. No Access

    Article

    Kinetics of the growth of domain blocks in KDP-type ferroelectric crystals

    The process of the domain-block structure formation at the ferroelectric phase transition in KDP-type crystals is investigated. An effective Hamiltonian of the system is constructed; the growth of domain block...

    P. A. Prudkovskiĭ in JETP Letters (2008)

  6. No Access

    Article

    Study of the kinetics of domain structures in thin ferromagnetic films by the Wang-Landau method

    The features of a phase transition between the strict striped domain structure in thin ferromagnetic films with transverse anisotropy and the so-called tetragonal phase, where domains can be twisted and broken...

    P. A. Prudkovskii in JETP Letters (2013)

  7. No Access

    Article

    Photoinduced gratings in a Sn2P2S6 ferroelectric crystal with the period depending on the optical pump power

    The light scattering in the form of ring structures in Sn2P2S6 crystals at the propagation of intense laser pump radiation along the b crystallographic axis is detected. Radiation passing through a crystal is com...

    P. A. Prudkovskii, K. A. Brekhov, K. A. Grishunin, K. A. Kuznetsov… in JETP Letters (2017)

  8. No Access

    Article

    Effect of Pump Depletion on the Spectrum of Twin Beams

    The effect of pump depletion on the spectrum of twin beams, which appear in the process of collinear parametric down-conversion in a nonlinear crystal with an aperiodic domain structure and have a high degree ...

    P. A. Prudkovskii in JETP Letters (2018)

  9. No Access

    Article

    Effective Group Velocity and Shape of Twin Beams

    The shape and propagation velocities of pulsed twin beams generated in the process of parametric light down-conversion have been theoretically studied in the case where the delays caused by the dispersion of g...

    P. A. Prudkovskii in JETP Letters (2020)

  10. No Access

    Article

    Correlation Properties of an Optical–Terahertz Biphoton Field

    The effect of the structure of angular modes of an optical–terahertz biphoton field appearing in strongly nondegenerate parametric down-conversion on the possibility of measuring nonclassical correlation prope...

    P. A. Prudkovskii in JETP Letters (2021)

  11. No Access

    Article

    Direct Measurement of the Correlation Function of Optical–Terahertz Biphotons

    The second-order correlation function which characterizes the quantum correlation between the optical and terahertz photons generated under spontaneous parametric down-conversion has been measured for the firs...

    A. A. Leontyev, K. A. Kuznetsov, P. A. Prudkovskii, D. A. Safronenkov… in JETP Letters (2021)

  12. No Access

    Article

    Schmidt Modes and the Time-Dependent Wavefunction of a Broadband Biphoton Field

    The wavefunction of a broadband biphoton field arising in parametric down-conversion in an aperiodically polarized nonlinear crystal with a linear chirp under the action of a short pump pulse has been studied ...

    P. A. Prudkovskii in JETP Letters (2022)