Theoretical Model of Controllable Waveguide Channels System Holographic Formation in Photopolymer-liquid Crystalline Composition
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.O. Semkin, S.N. Sharangovich In this work the theoretical model of holographic formation of controllable waveguide channels system in photopolymer-liquid crystalline composition is developed. The ability to control the light propagation conditions in waveguides by external electric field impact is demonstrated. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Refractive Index Measurement Using the Laser Profiler
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Vladislav Kolchinskiy, Cheng-Hung Shih, Ikai Lo, Roman Romashko The paper proposes a method for measuring the refractive index of the plane-parallel samples of the material using laser profiler. The method is based on measurement of the displacement due to refraction of the laser beam passing through a sample of known geometry. The developed method was used to measure the refractive index of gallium nitride on the range of optical wavelengths (470, 561 and 632nm). The measurement error of the refractive index was 10-3. The experimentally obtained va...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Thermo- and Mechanically Stable Electro-optic Q-switches Based on the RKTP Crystal
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): O.T. Vazhinsky, K.S. Vazhinskaya, I.A. Pargachev, L.Y. Serebrennikov, V.A. Krakovsky The theoretical and experimental curves of temperature dependence of transmitting the light by electro-optic element based on the RKTP crystal are presented. The temperature dependence of contrast ratio of electro-optic Q-switches assembled by different technologies is represented. Also the results of mechanical properties of EO Q-switches tested on climatic influence are shown. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Optical Formation of Waveguide Elements in Photorefractive Surface Layer of a Lithium Niobate Sample
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.D. Bezpaly, V.M. Shandarov Formation of channel optical waveguides due to the sequential point-to-point exposure of local stripe-like regions of Y-cut lithium niobate sample surface is experimentally investigated. The surface layer of the sample is thermally doped with Cu ions to increase its photorefractive sensitivity. The laser radiation with wavelength of 532 nm and optical power of 10 mW is used for the crystal exposure in experiments. The optical inhomogeneities formed during the sample exposure are studied with their probing by laser beams wi...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Highly Effective Light Beam Diffraction on Holographic PDLC Photonic Structure, Controllable by the Spatially Inhomogeneous Electric Field
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.O. Semkin, S.N. Sharangovich In this work the highly effiective light beam diffraction on holographic photonic structure formed in polymer-dispersed liquid crystal (PDLCs) is theoretically described. The ability to manage its diffraction characteristics by the spatially inhomogeneous electric field is also shown. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Polychromatic Two-wave Mixing in a Cubic Photorefractive Crystal
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): R.V. Romashko, M.A. Asalkhanova, Yu.N. Kulchin Model of polychromatic two-wave mixing in a cubic photorefractive crystal is proposed. The model is based on the coupled waves theory and allow simulate the hologram recording process in PRC. Based on proposed model the adaptive polychromatic interferometer could be designed. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Special Features of Copper(II) Detection in Aqueous Solutions
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.A. Sergeev, A.Y. Mironenko, A.A. Leonov, A.E. Nazirov, S.S. Voznesenskiy, S.Y. Bratskaya, Y.N. Kulchin New approach to organize fluorescent sensor system for determination of metal ions in aqueous solutions was presented. The approach is based on modification of hydrophilic polymer with sensitive fluorescent indicators. Possibility to register Cu2+ ions by analyzing of luminescence excitation spectra and lifetimes of the sensitive coating is presented. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
The Magnification of Atomic Lines Intensity Originated by laser Breakdown in Ultrasound Field
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.V. Bulanov, I.G. Nagorny Atomic lines of some chemical elements like sodium and magnesium were investigated for laser breakdown of water with the ultrasound field. The effect of magnification of these atomic lines resolution for salt water in ultrasound field was obtained. It is shown that the method of registration of acoustic emission from a breakdown zone allows to investigate thresholds and dynamics of laser breakdown which will be in accord with high-speed optical methods. The study revealed important practical applications of acoustic emission...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Features of Optical Breakdown of Liquid under the Action of Ultrasound
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): A.V. Bulanov, I.G. Nagorny, A.V. Storozhenko The experimental results show the sharply strengthened effects of acoustic emission from a breakdown zone by the joint influence of laser and ultrasonic irradiation. Various breakdown thresholds and character of acoustic emission in fresh and sea water are observed. The experimental result established that acoustic emission from optical breakdown of sea water in the presence and absence of ultrasound exceeds acoustic emission for the same experimental conditions in fresh water. (Source: Physics Procedia)
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Optically Induced Space-charge and Conductivity Gratings in Wide-bandgap Semiconductors
We report optical excitation of space-charge and conductivity gratings in wide-bandgap semiconductors. The approach is based on the illumination of semiconductor material with an oscillating interference pattern formed of two light waves, one of which is phase modulated with frequency ω. The non-steady-state photocurrent flowing through the short-circuited semiconductor is the measurable quantity in this technique. The alternating current results from the periodic relative shifts of the photoconductivity and space charge electric field gratings which arise in the volume of the crystal under illumination. The experiments a...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Spiral Light Beams and Contour Image Processing
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Sergey A. Kishkin, Svetlana P. Kotova, Vladimir G. Volostnikov Spiral beams of light are characterized by their ability to remain structurally unchanged at propagation. They may have the shape of any closed curve. In the present paper a new approach is proposed within the framework of the contour analysis based on a close cooperation of modern coherent optics, theory of functions and numerical methods. An algorithm for comparing contours is presented and theoretically justified, which allows convincing of whether two contours are similar or not to wi...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Formation of Periodic Structures (2D-PhCs) by Scanning Electron Lithography
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): Dmitriy Utkin, Alexander Shklyev, Andrey Tsarev, Alexander Latyshev, Dmitriy Nasimov The formation of the periodic structures based on Si-materials by electron beam lithography technique has been studied. We have investigated lithography processes such as designing, exposition, development, etching end others. The developed technique allows forming close-packed arrays of elements and holes in the nanometre range. This can be used to produce two-dimensional photonic crystals (2D PhCs) with emitting micro cavities (missing holes) with lateral size pa...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Fabrication of High-aspect-ratio Microstructures for LIGA-technology by Sinchrotron Radiation Polymerisation of Thetetraacrylate Monomer
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): D.I. Derevyanko, V.V. Shelkovnikov, N.A. Orlova, B.G. Goldenberg, A.G. Lemzyakov, V.P. Korolkov The high-aspect ratio microstructures were fabricated by action of synchrotron x-ray on the synthesized tetraacrylate monomer: 3-[4-({4-[2,3-bis(prop-2-enoyloxy)propoxy]phenyl}sulfanyl)phenoxy]-3-(prop-2-enoyloxy)propan-2-yl prop-2-enoate. The storage ring VEPP-3 (electron energy is 2GeV) at the station «LIGA» of BINP SB RAS was used as the source of the synchrotron radiation. The dependence of the thickness of the x-ray polymerized samples vs. the ab...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Green's Functions of Polaritons in a Medium with Zero-mean Inhomogeneous Coupling Parameter
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): V.A. Ignatchenko, D.S. Polukhin Dynamic susceptibilities (Green's functions) of the interacting electromagnetic waves G” e (ω) and optical phonons G” u (ω) in a medium with zero-mean inhomogeneous coupling parameter have been considered. The calculation was performed using a self-consistent approximation for the two stochastically interacting wave fields. It is shown that on the tops of the resonance maxima of the imaginary parts of the Green functions the fine structure is formed: a minimum (dip) on the top of G” e (ω) and narrow maximum (pe...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
Local Density of States in One-dimensional Photonic Crystals and Sinusoidal Superlattices
Publication date: 2017 Source:Physics Procedia, Volume 86 Author(s): V.A. Ignatchenko, D.S. Tsikalov We have calculated the local density of states (LDOS) for four Brillouin zones of a superlattice for a plane source depending on its location relative to the change in the profile of dielectricpermeability ɛ(z) of the superlattice. It is shown that the LDOS for the cases of sinusoidal and rectangular profiles of ɛ(z) are close to each other in the first and second Brillouin zones, and sharp differences between them appear beginning with the third zone. Radical changes in the LDOS occur in a rectangular superlattice wi...
Source: Physics Procedia - February 20, 2017 Category: Physics Source Type: research
