Том 80, № 1 (2016)

An experimental setup for studying the distribution of a quantum key in a fiber optic communication line designed at the Institute of Semiconductor Physics, Russian Academy of Sciences, Siberian Branch is presented. The structure of a unified control unit for studying the distributed quantum key setup using the BB84 protocol with phase encoding is described. Experimental results on quantum key generation are given.

Tissue localization and the co-expression of the phosphorylated and nonphosphorylated parts of the p38 MAP kinase cascade in the reparative process are studied via confocal and fluorescence microscopy using a model of a skin–muscle wound. It is established that the peak of the cascade activity falls on the third day. The advantages of laser confocal microscopy to assess the co-expression of regulatory cascades and the possibility of numerically evaluating the analyzed changes are demonstrtaed.

The effect of the initial density of nonequilibrium electron–hole pairs on the kinetics of their relaxation is analyzed. The influence of cooling, formation, ionization, and radiative recombination of excitons is discussed. It is shown that the exciton lifetime increases with the optical excitation density and, as a result, maximum exciton density is attained for a longer time.

The characteristics of LiF films containing Ag nanoparticles prepared via vacuum thermal deposition and magnetron sputtering, and then painted in microwave discharge plasma, are investigated. It is shown that simple and freely available ion-plasma technologies allow us to obtain nanosized LiF layers promising for use in photonics.

The spectral absorption properties of the rifampicin organic compound in solutions with different pH values are investigated. The absorption lines of rifampicin molecules in the UV and visible regions of the spectrum are calculated using the self-consistent field approach. The nature of the absorption bands of the rifampicin complex molecule are studied on the basis of quantum-chemical calculations of its model fragments.

The thermogravimetric parameters of the thermal degradation of nanocomposites containing noble metal (Ag, Au, Pd, and Pt) nanoparticles in the arabinogalactan matrix are estimated. The effect nanoparticles have on the electrical conductivity of nanocomposites with the arabinogalactan dielectric matrix is investigated in detail.

The interaction between femtosecond laser radiation in the filamentation mode and lithium fluoride optical ceramics is investigated experimentally. It is shown that irradiating optical ceramics based on lithium fluoride with femtosecond laser pulses in the near infrared spectral region effectively produces luminescence centers characteristic of radiation-colored single crystals.

Different modes of conjugate heat transfer in a crystal environment–growth chamber walls system with geometry similar to the upper part of a Czochralski thermal unit are investigated numerically. Calculations are performed for an argon Prandtl number of 0.68 and a Grashof number of 16000. The thermal stress fields in the crystal are calculated using the resulting temperature fields.

The spectral properties of a promising laser material, ternary molybdate Li₃Ba₂Gd₃(MoO₄)₈:Nd³⁺, are studied (i.e., its optical absorption spectra, luminescence spectra, kinetic of luminescence decay, and temperature dependence of luminescence). Luminescence of the crystalline matrix is detected, and the temperature dependence of its intensity and reabsorption by neodymium are investigated.

The release of energy in the form of the light sum of thermally stimulated luminescence (TSL), stored under conditions of self-focusing and the multiple filamentation of femtosecond laser radiation during the interaction between model wide-bandgap dielectric crystals of lithium fluoride is studied. It is shown that F₂ color centers are important centers of emission in the TSL process.

Data from observing the infrasound effects induced by the Chelyabinsk meteoroid impact of February 15, 2013 are presented. Similar infrasound effects registered earlier and ways of interpreting them are described. The characteristics of the infrasound station of the Institute of Solar and Terrestrial Physics, Russian Academy of Sciences, Siberian Branch, Irkutsk, which registered the effect of the meteoroid explosion in the atmosphere, are also described. The shape of the infrasound signal from the Chelyabinsk meteoroid is presented and its parameters are discussed.