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Information × Registration Number 0217U002387, 0112U001716 , R & D reports Title Optical, electrophysical, magnetotransport properties of atomic-molecular systems and solids states materials with different types of conductivities and structures organizations. popup.stage_title Head Blonskyi Ivan Vasylyovych, Registration Date 09-02-2017 Organization Institute of physics NASU popup.description2 Objects of research - ultrashort light pulses, nanoparticles of noble metals, semiconductors; organic and inorganic semiconductors, high-temperature superconductors, ferroelectrics, chalcogenide glass ceramics, magneto-mixed crystals, liquid crystals. The aim - to acquire new knowledge about lows of distribution and interaction of laser radiation with media in different aggregate states and their structural organization, properties of soft matter and solid state objects with different types of conductivity under light, electrical, magnetic and thermal loads. Research methods - optical spectroscopy of absorption and emission of light, Raman scattering, Z-scan, two-photon absorption, laser holographic techniques, microscopy, photoconductivity, structural analysis. It is suggested a new method of storing information in quantum systems by coherent superposition of quantum states, the original idea of which is that the coherence of the qubit is recorded in the population of a three-level system by a short sequence of laser pulses, and the time of the storage is limited only by the lifetime of their populations; it is found that refractive nonlinear optical response in 5CB nematic liquid crystal can be increased by an order of magnitude by "filing" of polymer-azodye complexes; a new approach to the formation of a given distribution of laser energy on a technological target is suggested by superposition of a package of holographic images; it is found and developed a model of giant deceleration of light pulses at four-wave mixing in SPS single crystals; it is shown experimentally that the angular dependence of emission wavelength of femtosecond conical radiation is formed in the multistep process of four-wave mixing and it is determined by the terms of the longitudinal phase matching over a wide spectral range; it is found that weak grip of the liquid crystal with the surface of a chalcogenide glass allows to record the polarization gratings in liquid crystal cells, diffraction efficiency of which does not depend on the optical anisotropy of the liquid crystal; new organic structures with efficient two-photon absorption are designed for organic photo-electronics and two-photon fluorescence microscopy; the polarizing elements in liquid crystal cells with structural singularities are created; it is found for the first time that pronounced size effect is inherent for the pyroelectric response of multilayer pyroactive structures, which manifests itself in the dependence of the features of the frequency spectrum of pyrocurrent on the thickness of the pyroactive film; the presence of anisotropy, which rotates with respect to the direction of saturating magnetic field, is revealed in full Heusler alloys of stoichiometric composition; a new example of "anomalous diffusion" of colloids in the environment, which has distant orientational order, is discovered and it is shown that thermal fluctuations of orientation of solvent molecules can transfer momentum to the colloid; it is proved that the existence of abnormally narrow resonance absorption line in He II on the roton frequency is caused by the presence of a steady dipole layer in He II near the surface of resonator; concentrations of microscopic spin states are determined in the example of CdMnTe single crystals; precision cryosystems are created for electron microscopy, magnetophysical and spectral studies. Product Description popup.authors Блонський Іван Васильович Бондар Михайло Віталійович Бродин Михайло Семенович Гнатенко Юрій Павлович Жарков Іван Павлович Кадан Віктор Миколайович Курик Михайло Васильович Негрійко Анатолій Михайлович Одулов Сергій Георгійович Пашицький Ернст Анатолійович Резніков Юрій Олександрович Рябченко Сергій Михайлович Самойлов Володимир Борисович Соскін Марат Самуїлович Яценко Леонід Петрович popup.nrat_date 2020-04-02 Close