bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of antireflective coatings based on SiO2/Si3N4 on textured silicon for heterojunction solar cells
Authors: Nevenchannyy Y , Khoruzhiy K , Kudryashov D 
Published: December 2019

Abstract
The technology of antireflective coatings formation on textured silicon by magnetron sputtering was developed. The growth rates of individuals thin films were determined as well as their refractive indexes. According to the results obtained an antireflective coating based on SiO2/Si3N4 on textured silicon with a thickness of SiO2 68 nm and Si3N4 of 74 nm showed the lowest reflection.
Experimental study of self-induced transparency mode-locking in Ti:sapphire laser
Authors: Arkhipov M V , Arkhipov R M , Shimko A A , Babushkin I , Rosanov N N 
Published: December 2019

Abstract
In this paper, passive mode-locking in Ti:sapphire laser with a coherent absorber cells with rubidium vapor placed in the cavity is demonstrated experimentally. For the best of our knowledge these experiments are the first time experimental demonstration of passive mode-locking based on self-induced transparency regime in the coherent absorber. Up to now, such a regime has not been observed experimentally and was predicted only theoretically.
The influence of the method of applying a smearing layer on the surface characteristics of steel X12CrNiTi18-10 after laser alloying
Authors: Proskuryakov V , Rodionov I , Koshuro V , Fomin A , Borodina S 
Published: December 2019

Abstract
A comparative analysis of the influence of the method of applying a smearing layer of graphite paste and anatase powder on the morphology and hardness of stainless chromium-nickel steel X12CrNiTi18-10 was carried out. It has been established that for hardening the surface of stainless steel it is advisable to use a smearing consisting of two layers: 1 - graphite paste and 2 - anatase nanoparticles powder. Laser pulsed doping of the surface with the specified coating structure allows forming a hardened modified layer with a thickness of 60 μm on steel, with a hardness value of up to 6 ±0.1 GPa with a total porosity of 44%.
NdYAG surface modification of ZnO for solar cells
Authors: Redka D , Mukhin N , Grishkanich A , Terukov E , Hirsch S , Ignateva L 
Published: December 2019

Abstract
Zinc oxide films are used as a photovoltaic transparent electrodes for current collection. They are a good substitute for expensive transparent electrodes on the basis of Indium tin oxide. The ZnO films fabricated with a certain morphology of the structure are able to act as a light diffuser.
Shapes of polarization sensitive photocurrent pulses in Ag/Pd nanocomposite films: influence of firing temperature
Authors: Saushin A S , Styapshin V M , Aleksandrovich E V , Svirko Yu P , Mikheev G M 
Published: December 2019

Abstract
The results of investigation of the shapes of polarization-sensitive photocurrent pulses in nanocomposite Ag/Pd films with different temperatures of firing are presented. Ag/Pd nanocomposite films were produced in accordance with thick film technology at temperatures T = 773 and 1013 K. Photocurrent excitation was carried out by femtosecond laser pulses. The obtained polarization photocurrent dependencies are characteristic for photocurrent due to photon drag and surface photogalvanic effects. It was shown that longitudinal photocurrent pulse duration in 773 K films (26 ns) is significantly longer than in 1013 K films (3 ns).
Direct GaInP-to-Ge optical interaction in the triple-junction solar cells with thinned intermediate GaAs subcell
Authors: Levina S A , Filimonov E D , Mintairov M A , Shvarts M Z 
Published: December 2019

Abstract
In the present work processes of direct light coupling in the triple-junction solar cells between top GaInP (wide band gap) and bottom Ge (narrow band gap) subcells are considered, when parameters of intermediate optical medium (comprised of middle GaAs p-n junction layers) are changed. Conditions of luminescent coupling gain and blocking are studied in multijunction structures with selectively tuned built-in photonic structures such as Bragg reflectors. An ability to manage the efficiency of optical interaction between subcells is investigated.
Organic light-emitting diodes with colloidal quantum dots in the active layer
Authors: Degterev A E , Mikhailov I I , Lamkin I A , Tarasov S A 
Published: December 2019

Abstract
In this research we have created light-emitting structures that contain colloidal quantum dots of cadmium selenide in the active layer. To do so, we have used methods of vacuum thermal deposition and spin coating for the formation of organic layers. We have compared photo- and electroluminescence spectra of the structures, and have revealed necessary conditions for the creation of high quality layers.
Current induced mode competition in microdisk lasers
Authors: Boikov I K , Savelyev A V , Breuer S , Korenev V V , Kudryavcev K E , Kryzhanovskaya N V , Maximov M V , Zhukov A E 
Published: December 2019

Abstract
A phenomenon of mode competition in microdisk lasers under various injection currents was studied. The increase of the injection current causes rise of the internal temperature. The modeling has shown that this increase leads to the shift of the gain spectrum. That may be enough to cause drastic redistribution of emitted power between microdisk modes. This effect has been studied in the experiment and by the numerical simulation.
Synthesis, structure and spectroscopy of Fe2+:MgAl2O4 transparent ceramics
Authors: Basyrova L , Balabanov S , Belyaev A , Drobotenko V , Volokitina A , Vitkin V , Dymshits O , Loiko P 
Published: December 2019

Abstract
Transparent ceramics based on magnesium aluminium spinel, MgAl2O4, doped with iron ions (Fe2+) are synthesized by hot pressing (at 1500 °C / 50 MPa) of powders obtained by the sol-gel method. The ceramics are characterized by X-ray diffraction, SEM, Raman and optical spectroscopy. The ceramics exhibit a broad (1.3-3.5 μm) absorption due to the 5E → 5T2 (5D) transition of Fe2+ ions in Td
sites and they are promising for applications as saturable absorbers of mid-infrared lasers.
Interface Layers of Niobium Nitride Thin Films
Authors: Lubenchenko A V , Iachuk V A , Krause S , Pavolotsky A B , Ivanov D A , Lubenchenko O I , Pavlov O N 
Published: December 2019

Abstract
Intermediate layers formed by thin NbN films are studied. A surface phase of NbN different from the bulk one under the oxide layer and a layer consisting of NbN
x
-SiO
y
between the film and the substrate are found.
Flat-top laser beams over an extended range
Authors: Reddy Andra Naresh Kumar , Pal Vishwa , Mahler Simon , Friesem Asher A. , Davidson Nir 
Published: December 2019

Abstract
Designs based on single diffractive-optical-elements for obtaining flat-top laser intensity distributions that remain constant over a long range during free-space propagation are presented. Flat-top beams with different orders n exhibit a different range of propagation. For various working distances z, the resulting flat-top beam yields a different depth of focus. By controlling spectral properties of laser distributions, it is possible to maintain invariant flat-top intensity distributions for relatively long propagation distances.
Theoretical optimization of the photolithography through array of 1.2 μm silica microspheres
Authors: Dvoretckaia L N , Mozharov A M , Bolshakov A D , Fedorov V V , Vasiliev A A , Mukhin I S 
Published: December 2019

Abstract
Interest in heteroepitaxy of III-V compounds on Si has been growing rapidly in recent years due to the potential of the optoelectronic components integration on silicon. However, most of the semiconductor compounds conventional in optoelectronics cannot be easily integrated on Si substrates due to the formation of the lattice defects. In this paper, we consider the fabrication of the mask consisting of the ordered nanoscale holes with the use of microsphere photolithography for selective epitaxial growth – promising approach for nanostructures fabrication on mismatched substrates. We have carried out the calculation of electromagnetic wave absorption in the photoresist layer through 1.2 μm microspherical silica lenses. The theoretical optimization of the photoresist thickness parameter allowed to obtain a value at which the minimum holes diameter in the photoresist is achieved. These data are necessary for carrying out the process of lithography through microspherical lenses to create a patterned growth mask.
On the need to control the state of the flowing media by the values of relaxation constants
Authors: Myazin N S , Davydov V V , Yushkova V V , Glinushkin A P , Taranda N I , Rud’ V Yu 
Published: December 2019

Abstract
The article substantiates the necessity of measuring the longitudinal T1 and transverse T2 relaxation times of the flowing media to control its state. For such measurements, a new method for measuring T1 in a flowing fluid is proposed. Therefore, the results of experimental studies are presented. In addition, measured values of relaxation constants were compared to the data obtained on industrial devices was performed. The results of this comparison are also presented.
Optical properties of Fe- and Nd-doped ZnSe crystals measured by pump-probe spectroscopy
Authors: Zhukova M O , Nabilkova A O , Putilin S E , Chegnov V P , Chegnova O I , Tcypkin A N 
Published: December 2019

Abstract
We present the excited-state dynamics and optical properties of Fe- and Nd-diffusion doped zinc selenide polycrystals with different concentration measured by pump-probe spectroscopy in the visible and NIR range (400-1000 nm). The introduction of dopants allows one to control the optical properties of samples, which then can be used to create effective optoelectronic components for wide spectral ranges.
Energy transfer in heteronuclear rare gas clusters under multiphoton excitation and ionization
Authors: Balmaev I , Serdobintsev P , Melnikov A , Pastor A , Khodorkovskiy M 
Published: December 2019

Abstract
The ionization processes of the ArM, XeN and XeNArM clusters in a supersonic beam with multiphoton excitation were studied. The third 263 nm harmonics of a femtosecond Ti : sapphire laser were used for excitation and ionization. Kinetic energy spectra of photoelectrons has been recorded by a magnetic bottle time-of-flight electron spectrometer. Analysis of the electronic spectra of multiphoton ionization of clusters shows that, in heteronuclear clusters, the transfer of excitation energy between xenon and argon atoms plays a significant role in ionization.
Influence of neutron irradiation on optoelectronic properties of structures with the InAs/GaAs quantum dots
Authors: Volkova N S , Gorshkov A P , Trufanov A N , Istomin L A , Levichev S 
Published: December 2019

Abstract
The effect of neutron irradiation on the photosensitivity of the InAs/GaAs quantum dots has been investigated. It was shown that after neutron irradiation with a fluence of 1.5×1015 cm-2 the photosensitivity at the room temperature has been decreased at 3 times, whereas the shape of the photosensitivity’s temperature dependence didn’t reveal any visible changes, despite an appearance of defects in quantum dot layer. The effect was explained by the difficulty of a motion of photoexcited carriers in quantum dot layer to the recombination centres arised after irradiation.
Fabrication and optical properties of Au:SiO2 nanostructured thin films
Authors: Ilkiv I V , Morozov K M , Kotlyar K P , Amelchuk D. , Bouravleuv A D 
Published: December 2019

Abstract
We demonstrate synthesis and theoretical study of the optical properties of Au:SiO2 nanocomposite thin films. Localized surface plasmon resonance peak induced by Au NPs was clearly observed in optical spectra at wavelength range between 500 and 600 nm. Intensity and position of PL peak are demonstrated to depend on the Au NPs embedding depth.
Spectral and luminescent properties of codoped Er-Yb fluorophosphates glasses with small content of phosphate
Authors: Bogdanov O , Kolobkova E 
Published: December 2019

Abstract
Novel fluorophosphate glasses with small content of phosphate doped by various concentration of ErF3 and 5 mol. % of YbF3 were obtained. Absorption spectrum and experimental τexp lifetimes for all concentration of ErF3 were measured. Radiation lifetime of the excited state τexp and emission cross-section σemi were calculated. It was shown that the highest quantum yield q (100%), τexp (9 ms) and σemi (0.64×10-20 cm-2) corresponds to 0.5 mol. % ErF3.
Simulation of infrared photonic crystal fibers based on crystals system AgBr – TlBr0.46I0.54
Authors: Salimgareev D. D. , Lashova A.A. , Shmygalev A. S. , Lvov A.E. , Zhukova L. V. 
Published: December 2019

Abstract
In this paper, a computer simulation of photonic crystal fibers (PCF) based on the AgBr – TlBr0.46I0.54 system was performed. The simulation was carried out in the SMTP program integrated into Matlab. As a simulation result, PCF with the hexagonal structure of PBG-inserts with an increased mode field diameter of up to 200 μm was obtained.
Towards an efficient light-emitting source based on self-implanted silicon with dislocation-related luminescence
Authors: Korolev D S , Nikolskaya A A , Tereshchenko A N , Mikhaylov A N , Belov A I , Tetelbaum D I 
Published: December 2019

Abstract
The regularities of ion synthesis of dislocation-related luminescence centers in silicon have been investigated. By varying the conditions of additional irradiation with boron ions, as well as the conditions of subsequent annealing, we obtain an increase in the luminescence intensity, as well as a shift of maximum of the temperature dependence towards higher temperatures. It was found for the first time that, for the highest used dose of boron ions (3·1017 cm-2) and additional heat treatment at 830 °C, it is possible to get the measurable luminescence at room temperature.
The research of temperature instability influence of fiber optic communication line in phase direction finder channels on peleng accuracy
Authors: Podstrigaev A S , Lukiyanov A S , Smolyakov A V , Shishkov A N , Davydov V V , Glinuchkin A P , Sinicyna E A 
Published: December 2019

Abstract
In the article the influence of optical fiber temperature change to phase shift between optical signals in transmission channels is considered. The method for influence assessment of temperature phase shift on bearing accuracy is proposed. The results of experimental researchers and calculations are presented.
Properties of GaN optomechanical nanobeam cavity
Authors: Morozov K M , Ivanov K A , Girshova E I , Sokolovskii A S , Mikitchuk A P 
Published: December 2019

Abstract
Gallium nitride based nanobeam cavity system was theoretically analysed by using finite element method-based model. Optical and mechanical resonant localized modes structure of the nanobeam cavity was calculated. Depend on the geometrical properties there were found modes with high quality factor for the both cases. The maximum optical quality factor reaches value 5.104 in cavity with value d = 90nm.
Topological plasmon-polariton on a Dirac magnet helical state
Authors: Iorsh I V , Rakhmanova G R , Titov M 
Published: December 2019

Abstract
A one-dimensional plasmon-polariton which is characterized by non-linear dispersion is supported by electromagnetic field interacting with topologically protected helical state. The electronic helical state arises at the surface of topological insulator in the close proximity of the ferromagnet. In a two-dimensional Dirac magnet these electro-optical excitations are limited by domain walls. Topological electronic imagining of domain walls can provide generally a novel tool to couple magnetic dynamics with both transport and optical properties of helical electronic states An exact dispersion relation for the topological plasmon-polariton were obtained.
Optical trapping and arrangement with reconfigurable “bottle” beam for digital holographic microscopy
Authors: Shostka N V , Sokolenko B N , Karakcheva O S , Poletaev D A , Titova A O , Prisyazhniuk A V , Ismailov I A 
Published: December 2019

Abstract
The design and construction of optical tweezers based on uniaxial crystal anisotropy for generation of adjustable “bottle” beam trap carrying optical vortex with orbital angular momentum is considered. In coupling with digital holographic microscopy, optical trapping becomes a high precision instrument for visualization, shape definition and refractivity measurements of isolated micro structures and biological objects in-situ. The non-destructive and sterile non-contact tweezing of specimens or their parts in localized intensity minima of coherent vortex beam was performed with using of 200 mW semiconductor 532 nm trapping laser and LiNbO3 crystal. Visualization and position control of trapped marine centric diatoms was performed by a lens-free axial digital holographic microscopy in liquid medium.
Extracting hot-spot correlation length from SNSPD tomography data
Authors: Polyakova M I , Florya I N , Semenov A V , Korneev A A , Goltsman G N 
Published: December 2019

Abstract
We present data of quantum detector tomography for the samples specifically optimized for this problem. Using this method, we take results of hot-spot correlation length of 17 ± 2 nm.
Static light scattering for determination of physical parameters of macro- and nanoparticles
Authors: Kolokolnikov I , Nepomnyashchaya E , Velichko E 
Published: December 2019

Abstract
The work is dedicated to determination of physical parameters of micro- and nanoparticles by static light scattering method. We present static light scattering device and theory to determine sizes of particles in suspensions. We analyze calculated distributions of scattering intensity for particles of different sizes and compare it with experimental data, received for spherical particles of different sizes. We also suggest theory to calculate form factor of scattering intensity for micro- and nanoparticles of different shapes. We also demonstrated that Rayleigh scattering theory is better to be applied for small particles investigation.
Effective formation of diffraction-free laser beams based on the diaphragm of the annular spatial spectrum
Authors: Khorin PA 
Published: December 2019

Abstract
In this article, we simulate the formation of diffraction-free beams, which combine some of the properties required for technologies such as planar microscopy, information coding and optical manipulation. Analytical functions in combination with a diaphragmed annular spatial spectrum are proposed as an optical beam. The analysis is carried out at distribution in the free environment and lens systems.
X-Ray linear polarization degree for RGBL beamline BESSY II
Authors: Petrova O V , Mingaleva A E , Sivkov D V , Nekipelov S V , Skandakov R N , Sivkov V N 
Published: December 2019

Abstract
The results of the calculation of the X-Ray synchrotron radiation linear polarization degree of Russian-German dipole beamline at synchrotron BESSY II are discussed. It is shown that the integral synchrotron radiation linear polarization degree (λ, ψh) for incident photon energy ε=300eV reaches 80%
CWDM demultiplexer using anti-reflection, contra-directional couplers based on silicon nitride rib waveguide
Authors: Zubkova E , Golikov A , An P , Kovalyuk V , Korneev A , Ferrari S , Pernice W , Goltsman G 
Published: December 2019

Abstract
We report on the development and fabrication of a 9-channel coarse wavelength-division multiplexing for telecommunication wavelengths (1550 nm) using anti-reflection contra-directional couplers, based on silicon nitride (Si3N4) rib waveguide. The transmitted and reflected spectrum in each channel of the demultiplexer were measured. The average full width at half maximum of the transmitted (reflected) spectra is about 3 nm.
Ultraspectral UV polychromator for SRS-isotopic sensor
Authors: Zhevlakov A , Miharev E , Grishkanich A , Chubchenko Y , Ignateva L , Paklinov N 
Published: December 2019

Abstract
We have developed a spectral module for the selection of narrow characteristic spectral lines of isotopes in the ultraviolet Raman spectral channel. To allow resolving closely spaced isotope lines in the continuous input radiation spectrum, extremely high resolution λ / Δλ = 1000 is implemented. The total inverse linear dispersion at the output of the double polychromator (dλ / dl = 0.048 nm / mm) allows us to confidently separate the methane lines 283.31; 284.42 nm.
Increasing efficiency of GaN HEMT transistors in equipment for radiometry using numerical simulation
Authors: Tikhomirov V G , Gudkov A G , Agasieva S V , Dynaiev D D , Popov M K , Chizhikov S V 
Published: December 2019

Abstract
The numerical impact modeling of some external effects on devices based on AlGaN/GaN heterostructures (HEMT) was carried out. The mathematical model was created that allowed to predict the behavior of the drain current depending on condition changes in the heterostructure in the buffer region and to start the process of directed construction optimization of the devices based on AlGaN/GaN HEMT with the aim of improving their performances.
Quantum-mechanical models for calculating the electrical characteristics of semiconductor 2-d structures for technological optimization of nanoelectronics devices based on them
Authors: Koziy A A , Vetrova N A , Pchelintsev K P , Shashurin V D , Meshkov S A 
Published: December 2019

Abstract
In this paper, a computational algorithm has been developed for the quantum-mechanical model for predicting the electrical properties of 2-d semiconductor structures of nanoelectronics devices with a low-dimensional channel. The most important advantage of the developed algorithm is its scalability for the problems of technological optimization of nanoelectronics devices. An example of application of the developed software to solving the problem of predicting the electrical properties of a low barrier detector sub-terahertz diode with zero-bias in the framework of solving the problem of its technological optimization is presented.
Wireless software-hardware complex for testing semiconductor structures
Authors: Loganchuk S M , Touel L , Chebotarev S N , Goncharova L M , Varnavskaya A V , Touel S , Mohamed A A A 
Published: December 2019

Abstract
Wireless system for measuring current-voltage characteristics was developed. Software for a smartphone was developed in the integrated development environment Unity. The data about current and voltage was transmitted by Bluetooth and Wi-fi for smartphone and computer respectively. I-V curves were built on computer using program, developed in the Visual Studio package and coded in C#. For data verification the simulation of diodes’ parameters was provided by solving the Poisson equations and the drift-diffusion model.
Magnetic-field-driven electron transport in SOI back-gate device
Authors: Shanidze L V , Tarasov A S , Lukyanenko A V , Rautskii M V , Yakovlev I A , Zelenov F N , Baron F A , Volkov N V 
Published: December 2019

Abstract
In this work, we studied the electronic transport properties of silicon nanowire field-effect transistors with a back gate. A nontrivial magnetic field influence on the drain current at low temperature (10 K) was found. The strongest effect was observed in the majority carrier accumulation mode. In this mode magnetic field of 0.5 T increases current through the device by more than an order of magnitude. The paper describes the possible mechanisms of the magnetic field influence on the electronic transport characteristics of the structures.