Light-induced Effects in Sillenite Crystals with Shallow and Deep Traps
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Tatiana Kornienko, Marina Kisteneva, Stanislav Shandarov, Alexei Tolstik This paper presents the light-induced effects in bismuth silicon and bismuth titanium oxide crystals associated both with the electron transitions into the conduction band and with the filling of shallow and deep traps, which determine the optical and electroconductive properties of these crystals. The dynamics of photoconductivity and light-induced absorption is analyzed under conditions of pulsed laser illumination at the wavelength of 532nm. The possibility to describe the r...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Globular and Optically Transparent Photonic Crystals Based on 3D-opal Matrix and REE
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): S.N. Ivicheva, Yu.F. Kargin, V.S. Gorelik By repeatedly filling the octahedral and tetrahedral pores of 3D-silica opal matrices with silica sol doped with rare-earth elements with subsequent heat treatment globular photonic crystals filled with mesoporous glass and optically transparent photonic crystals (quantytes) containing 10-30ppm REE were produced, depending on the annealing temperature. Voids of fcc lattice formed by amorphous spherical globules of SiO2 in globular photonic crystals are filled (up to 70%) by mesoporous glass doped with rare ea...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Investigation of Spectral Lines Broadening in Femtosecond Laser Plasma Generated on the Surface of the Barium Water Solutions
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): M.Yu. Babiy, S.S. Golik, A.A. Ilyin, Yu.S. Biryukova, T.M. Agapova, V.V. Lisitsa The spectral lines broadening in femtosecond laser plasma generated by the 45 fs Ti:Sa laser pulses on the surface of the water solutions of Ba is investigated. Under the experimental conditions, determined the temperature of femtosecond laser plasma is 3000K.The contribution of the Doppler broadening for spectral lines width is minimal and amounts 0,0022nm for Ba. The main mechanism of Ba spectral line broadening in experimental conditions is resonance. The resulting...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Analysis of Spectral Features of Seawaterbiooptical Components Fluorescence from the Excitation-emission Matrix
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): P.A. Salyuk, I.G. Nagorny The paper presents the method for processing of excitation-emission matrix of sea water and the allocation of the spectral characteristics of different types of colored dissolved organic matter (CDOM) and phytoplankton cells in seawater. The method consists of identification of regularly observed fluorescence peaks of CDOM in marine waters of different type and definition of the spectral ranges, where the predominant influence of these peaks are observed. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Infrared Thermography-based Biophotonics: Integrated Diagnostic Technique for Systemic Reaction Monitoring
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Boris G. Vainer, Vitaly V. Morozov A peculiar branch of biophotonics is a measurement, visualisation and quantitative analysis of infrared (IR) radiation emitted from living object surfaces. Focal plane array (FPA)-based IR cameras make it possible to realize in medicine the so called interventional infrared thermal diagnostics. An integrated technique aimed at the advancement of this new approach in biomedical science and practice is described in the paper. The assembled system includes a high-performance short-wave (2.45-3.05μm) or long-wave (8-14...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Origin of Photoplethysmographic Waveform at Green Light
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Alexei A. Kamshilin, Nikita B. Margaryants In this article we analyze a number of observations obtained with the reflection-mode photoplethysmography (PPG), which can hardly be explained by commonly accepted model of the PPG-signal formation. It is shown that the physiologic model of light interaction with living tissue recently proposed by our group provides reasonable explanation of all observations. According to this model, it is pulsatile transmural pressure of the arteries, which compresses/decompresses the density of capillaries in the dermis, t...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Plasmon-mediated Enhancement of Rhodamine 6G Spontaneous Emission on Laser-spalled Nanotextures
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.A. Kuchmizhak, A.V. Nepomnyashchii, O.B. Vitrik, Yu.N. Kulchin Biosensing characteristics of the laser-spalled nanotextures produced under single-pulse irradiation of a 500-nm thick Ag film surface were assessed by measuring spontaneous emission enhancement of overlaying Rhodamine 6G (Rh6G) molecules utilizing polarization-resolved confocal microspectroscopy technique. Our preliminary study shows for the first time that a single spalled micro-sized crater covered with sub-100nm sharp tips at a certain excitation conditions provides up to 40-fold p...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Photoluminescence and Low-threshold Nonlinear Optical Properties of SiO2 Nanoparticles
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.V. Amosov, V.P. Dzyuba, Yu.N. Kulchin, D.V. Storozhenko The paper reports the study of photoluminescence (PL) of disc- and elliptical-shaped SiO2 nanoparticles exited by photons with energy lower than silica bandgap. Differences in the PL spectra are found to be associated with the structure of the nanoparticle excitonic states of optical electrons. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Nano- and Microparticles in Welding Aerosol: Electronic and Microscopic Analysis
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): K.Yu. Kirichenko, V.A. Drozd, V.V. Chaika, A.V. Gridasov, A.S. Kholodov, A.A. Karabtsov, K.S. Golokhvast The paper presents the first results of the research of the morphological and material composition of the particles in welding aerosol. It is shown that in terms of morphology the particles are hollow and solid balls, sometimes covered with easily chipped off shell. There are also objects of other forms– ovals, polygons and needles. Fragments of the shell of hollow spheres have the size of up to 10μm (PM10) and jagged edges, making them and...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Nano- and Microparticles in Welding Aerosol: Granulometric Analysis
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): K.Yu. Kirichenko, V.A. Drozd, V.V. Chaika, A.V. Gridasov, A.S. Kholodov, K.S. Golokhvast The paper presents the first results of the study of the size of particles appearing in the welding process by means of laser granulometry. It is shown that welding aerosol is the source of nano-and micro-sized particles extremely dangerous for human and animal health. Particle size distribution in the microrange was from 1 to 10μm and up to 100%. It is shown that in 9 cases out of 28 with the use of various welding modes, welding rods and components the emis...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Analysis of Titanium Oxide Nanotubes System Formation Current
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): P.L. Titov, S.A. Schegoleva, N.B. Kondrikov Analysis of formation of highly-ordered titanium oxide nanotubes array at the level of currents is carried out. It has been found that marking impulse possesses fine structure characterized by uncommon behavior. It is a series of small steps alternated by sharp overshoots that can be identified as Levy flights. Attractor obtained from current realizations points at the existence of quasistochastic in terms of phase and strictly periodic mode of partial Levy flights. It corresponds to trigger mode of system ...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Influence of Formation Conditions on the Level of Arrays Ordering of Anodic Titanium Oxide Nanotubes
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): N.B. Kondrikov, P.L. Titov, S.A. Schegoleva, M.A. Khorin Nanotubular titanium oxide coatings with different morphology and dimensional parameters are formed by anodic oxidation under different voltage and time modes in fluorine aqueous-nonaqueous electrolytes containing glycerin as well as several surface-active agents (SAA). Their morphological peculiarities are examined and qualitative and quantitative analysis of obtained types of ordering is carried out, geometric configuration entropy are calculated on the base of analysis SEM images and theory...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Structure and Electronic Properties of Nano-complex CCl4 …Cr(AcacCl)3 on Evidence Derived from Vibrational Spectroscopy
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): S.N. Slabzhennikov, L.A. Kuarton, O.B. Ryabchenko In order to specify influence of intermolecular interaction on IR spectrum of interacting species, an investigation of a process CCl4 + Сr(АcacCl)3 → CCl4…Сr(АcacCl)3 has been performed by means of Hartree–Fock–Roothaan method in MIDI basis set with p- and d- polarization functions. An estimation of intermolecular interaction in geometrical parameters, electron density function both between interacting particles and inside themselves, frequencies and intensities of normal modes has been ca...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Modeling Optical Low-threshold Exciton Nonlinearity in Dielectric Nanocomposites
We report on calculations of exciton nonlinearity in dielectric nanocomposites. The effect of various parameters on the spectrum of nonlinear increment to the refractive index, such as size and form factor of the nanoparticles shown. Numerical simulations of the optical response of dielectric nanoparticles Al2O3 presented. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Nonlinear Optical Properties of Colloids with Carbon Nanoparticles
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.Yu. Mayor, D.Yu. Proschenko, S.S. Golik, I.V. Postnova, Yu.A. Shchipunov, A.A. Podlesnyh Experimentally studied linear and nonlinear characteristics of colloid on the basis of a new class of carbon nanoparticles (CN) synthesized by hydrothermal synthesis. The spectral characteristics of supercontinuum of the colloids with CN in the range 420 - 700nm were investigated. The effectiveness of excitation of one- and two-photon fluorescence colloids with UN was determined. The anomalous dependence of the nonlinear refractive index of the wavelength of...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
