bluuebunny/crossref_metadata_2025_split huggingface dataset:
Waste anthropogenic minerals in the circular economy
Authors: Cieplińska A , Szymanek A 
Published: December 2019

Abstract
The article presents the possibility of using calcareous wastes to produce alternative sorbents for flue gas desulphurization. Calcareous wastes from chemical plants produced during the propylene oxide production process were used. In order to assess the potential of stored waste, they were subjected to comprehensive physical and chemical tests: the chemical, morphological, structural, fractional composition and reactivity were determined. Due to the nature of its formation, lime waste was subjected to electromagnetic activation to improve its sorption properties. The impact of activation on physico-chemical properties was also determined. The verification of the tests carried out on a micro scale was the flue gas desulphurisation test performed on a real object using the activation technology in an electromagnetic mill. The aim of the test was to obtain similar results of flue gas desulphurisation with the use of a waste sorbent for the lime milk used in this method.
Problems with identification of vortex rings when using anemometry measurements.
Authors: Gruszka Konrad , Durajski Artur , Niegodajew Paweł , Bęben Mateusz , Elsner Witold , Gnatowska Renata , Šofer Michal 
Published: December 2019

Abstract
Measurement of key vortex rings properties with the use of anemometry techniques is not so straightforward due to the angular dispersion of these structures and in consequence change of their trajectories as they move downstream. Owing to the fact that in available literature no much attention is paid to this issue, there is still a need to address this problem. In the present work we show some preliminary data which allowed to quantify the dispersion of vortex rings when these propagate over a distance up eight orifice diameters. The presented results indicate that the vortex structures generated at a certain frequency are characterized by increasing unrepeatability and angular dispersion as a function of distance from the generator. This leads to difficulties in their identification because their position in respect to the fixed position of the hot-wire probe changes.
Some chosen aspects of CFB boilers operation
Authors: Kobyłecki Rafał , Zarzycki Robert , Bis Zbigniew 
Published: December 2019

Abstract
Central Europe, particularly Poland, has been one of the areas of intensive development of fluidized bed combustion technology for over 25 years. This paper deals with a brief discussion on the results of industrial tests carried out by the authors and focused on the reduction of nitrogen oxide emission, solids deposition and unburned carbon content in the fly ashes. Some selected data has been presented and come remarks and counteractions to improve the operation of industrial large-scale circulating fluidized bed boilers are given.
Study of the influence of the electrophysical properties of ZnO nanorods grown on glass on their gas-sensitive properties
Authors: Petrov V V , Abdullin Kh A , Starnikova A P , Varzarev Yu N 
Published: December 2019

Abstract
The article discusses the sensory properties of an array of ZnO-based nanorods, which were used as sensitive elements of carbon (II) oxide sensors. By hydrothermal synthesis, arrays of ZnO nanorods were grown on glass, which had an average transverse size of up to 40 nm and a height of up to 660 nm. Formed rods had a predominantly vertical orientation. Metal contacts were formed over the array of nanorods. Studies of the electrophysical properties showed that the temperature dependence of the conductivity of the formed structure has a hysteresis at temperatures above 160 ° C, and the current-voltage characteristic is close to linear. The gas sensitive properties of the ZnO array of nanorods were investigated to carbon monoxide (II) with a concentration of 20-100 ppm at operating temperatures from 20 to 270 ° C. It has been shown that the sensor response is strongly influenced by the rate of blowing the array with nanorod air or the test gas.
Atomic layer etching of Silicon Oxide
Authors: Kuzmenko V. , Miakonkikh A. , Rudenko K. 
Published: December 2019

Abstract
The atomic layer etching process for Silicon oxide is studied. The process consists of deposition step and activation step separated by pumping and purging steps. The deposition step is performed in C4F8 plasma and produces a polymer fluorocarbon film with 0.2-3 nm thickness. Then activation step is performed in Argon or Oxygen plasma with DC bias applied to the waferholder. Accelerated ions enhance reaction of fluorine atoms of the polymer film with underlaying Silicon oxide which leads to controllable saturated etching.
On the dendrite growth simulation during multitrack selective laser melting process
Authors: Dubrov A V , Mirzade F Kh , Dubrov V D 
Published: December 2019

Abstract
The evolution of the microstructure in the selective laser melting (SLM) process is investigated in the framework of a multiscale approach. The kinetic equation for the phase-field (order parameter) coupled with the energy transfer equation is used to describe the crystallization processes. To study the effect of technological parameters on the microstructure of the synthesized product, and to establish a connection between the models of macro- and micro-scale through the temperature gradient, numerical studies of macro processes in the formation of a series of parallel SLM tracks were carried out. It is shown that the adjustment of the laser power level changes the temperature dynamics in the test areas, which, in turn, through the changed temperature gradients affects the evolution of the microstructure in the micro-scale model. The calculations showed that the implemented numerical model qualitatively describes the kinetics of crystallization and formation of microstructures in the SLM process.
Substrate-removed flip-chip photodiode array based on InAsSbP/InAs double heterostructure
Authors: Karandashev S A , Klimov A A , Kunkov R E , Lavrov A A , Lukhmyrina T S , Matveev B A , Remennyi M A , Usikova A A 
Published: December 2019

Abstract
N-InAsSbP/InAs/P-InAsSbP double heterostructures have been grown onto n+-InAs substrate and further processed into 2×2 photodiode array containing no n+-InAs. C-V, spectral response as well as mid-IR photoluminescence and electroluminescence in the 77-300 K temperature range have been measured and used for photodiode characterization including D*(λ) and BLIP temperature evaluation.
Influence of two-stage growth during the formation of GaAs/Si heterostructures for the creation of optoelectronic devices
Authors: Geldash A A , Djuplin V N , Klimin V S , Solodovnik M S , Ageev O A 
Published: December 2019

Abstract
The development of GaAs/Si heterostructures can be an important stage for use as solar cells, LEDs and lasers based on silicon substrates. At present, A3B5 compounds grown epitaxial on Si substrates are of great interest because of the monolithic integration of optoelectronic devices with Si-based microelectronics. High-quality epitaxial growth of heterostructures will not only ensure high mobility of the carrier materials, but also preserve the advantages of lightweight and inexpensive Si substrates with high mechanical strength and excellent thermal parameters. However, obtaining A3B5 compounds with high quality crystals of GaAs/Si heterostructures is a difficult task due to the formation of an antiphase domain boundary as a result of the growth of polar GaAs on a non-polar Si substrate. Because of this, a high density of penetrating dislocations arises due to the mismatch of the lattice parameters (4.1%), as well as the coefficient of thermal expansion (62%).
Optically transparent conductive layer based on oriented metal networks
Authors: Nizameev I R , Nizameeva G R , Kadirov M K 
Published: December 2019

Abstract
The work is aimed at solving the problem of finding a promising alternative to indium tin oxide as an optically transparent electrode used in many modern devices such as solar cells, touch screens, transparent triboelectric generators, etc. In this paper, we propose the use of an original method for synthesizing oriented metal nano networks to create an electrically conductive layer on a surface of a glass substrate. Due to the orientation of metal networks, it is possible to significantly reduce the use of metal and increase open areas of the coating, which leads to preservation of electrical conductivity of the coating with a high degree of transparency. The method of depositing the proposed coating is based on the method of chemical precipitation from a liquid using a self-organized micellar template.
The model for in-plane and out-of-plane growth regimes of semiconductor nanowires
Authors: Berdnikov Y , Sibirev N V , Reznik R R , Redkov A V 
Published: December 2019

Abstract
In this work we present the model capable of prediction whether the vapor-liquid-solid growth would preferably result in the formation of in-plane (horizontal) or out-of-plane (vertical or inclined) nanowires. Within the model, we analyze the particular case of gold-catalyzed germanium nanowire growth on Ge(111), Ge(110) and Si(100) substrates. We focus on two aspects of the growth process: detachment of the catalyst from the substrate and stabilization of horizontal growth by nucleation at the nanowire-substrate-liquid line.
Dissociation and synthesis of target components during laser ablation of LiNbO3
Authors: Vakulov Z , Zamburg E G , Klimin V S , Miakonkikh A V , Clemente I E , Rudenko K V , Ageev O A 
Published: December 2019

Abstract
This paper shows the results of thermodynamic analysis of interfacial interaction in the lithium-niobium-oxygen system. The temperature dependences of the change in the Gibbs free energy calculated, taking into account the non-linear temperature dependences of the thermophysical properties of materials. Additionally, estimated the possibility of dissociation reactions of lithium and niobium oxides, as well as the reactions of lithium and niobium with oxygen. The results obtained can be used in the design and manufacture of integrated acousto-optic and piezoelectric devices, as well as for sensitive elements of sensors using various effects of surface acoustic waves.
A new method for monitoring the health condition based on nondestructive signals of laser radiation absorption and scattering
Authors: Davydov R V , Mazing M S , Yushkova V V , Davydov V V , Glinushkin A P , Stirmanov A V , Rud V Yu 
Published: December 2019

Abstract
The article describes a new method for processing a pulse wave, which is formed from the recorded absorption and scattering signals of laser radiation on a blood vessel or human tissues. A new method of tuning the optical part of the pulse oximeter has been developed to increase the reliability of the results in the rapid diagnosis of the human condition. Experimental data on studies of various people are presented.
Simulation of a THz radiation source on AlGaAs/GaAs superlattices
Authors: Dashkov A S , Goray L I 
Published: December 2019

Abstract
We report on the results of simulations of the carrier transport processes in THz radiation sources. The current-voltage characteristic, dipole matrix elements and LO-phonon relaxation time were obtained using the Ensemble Monte Carlo method, the shooting and effective mass methods. The electron-longitudinal phonon interaction assumed as a dominant mechanism of the carrier scattering for the current-voltage characteristic. The weakly coupled AlGaAs/GaAs superlattices considered for simulations.
Ultraviolet cathodoluminescence of pure zinc aluminate ZnAl2O4
Authors: Lisovskii S V , Meganov A V , Khrustov V R , Ivanov V V 
Published: December 2019

Abstract
The features of the intrinsic cathodoluminescence of pure zinc aluminate ZnAl2O4 having a radiation maximum in the range 250-270 nm are studied. The kinetics of the afterglow of a sample excited by short (∼ 2 ns) pulses is analyzed. Analysis and possible explanation of the influence of the type and composition of the atmosphere, in which zinc aluminate was annealed, is given. Possibilities for a multiple increase in the cathodoluminescence intensity of zinc aluminate for use in bactericidal lamps are demonstrated.
Nanosphere lithography on silicon oxide for high aspect ratio cryo etching of vertically-align silicon structures
Authors: Morozov I.A. , Gudovskikh A.S. , Kudryashov D. A. 
Published: December 2019

Abstract
Nowadays, classical silicon solar cell achieved efficiencies close to theoretical limit and new design of silicon solar cell is required. Vertically aligned silicon solar cells seems to be a promising design of future silicon multijunction solar cells. These structures can be produce with dry etching technics. However, dry etching requires high quality mask. Mask can be archived with classical photolithography, but photolithography is multistep process and cannot be used in mass production of solar cells, because of the price. Nanosphere lithography is a powerful one-step method to produce periodic mask on silicon, but polystyrene spheres does not have enough selectivity in silicon etching process. Etching depth in silicon that can be archived in cryo process with 900 nm polystyrene sphere is about 3 μm. For deep silicon etching, we have to use hard mask. In this paper, we investigated nanosphere lithography on 500 nm thick PECVD deposed silicon oxide on silicon. Influence of isopropyl content in nanosphere solution were investigated. The effect of process conditions is discussed in the paper.
Signal processing scheme for error control in visible light communication data transmission system
Authors: Borodkin A I , Gareev E Z , Krasavtsev I A , Kozyreva O A , Polukhin I S , Odnoblyudov M A , Bougrov V E 
Published: December 2019

Abstract
We developed wireless visible light simplex data transmission channel and error correction algorithm for the reciever. The system was design specially for using modern smartphone device as a receiver and a conventional domestic LED illuminator as transmitter. We calculated highest probable data transfer speed in our communication channel, fabricated the transmitter modulator and developed the client application for an android smartphone equipped with stock camera module, perform a series of data speed measurements and conducted the analysis of both analog and digital signals. The system allowed to transmit data with rates up to 8 kbps on distance up to 1.5 meters.
Temperature performance of InGaAs/InGaAlAsTemperature performance of InGaAs/InGaAlAs laser diodes with δ-doping active region
Authors: Rochas S S , Novikov I I , Gladyshev A G , Kolodeznyi E S , Maximov M V , Zubov F I , Shernyakov Yu M , Karachinsky L Ya , Zhukov A E , Denisov D V , Egorov A Yu 
Published: December 2019

Abstract
The optical gain performance of 1530-1565 nm laser diodes with active regions containing p-doped barrier layers has been investigated. We have studied the threshold current density and differential quantum efficiency in wide temperature range and compared modal gain behaviour of laser diodes made of heterostructure with delta-doped barrier layers by carbon at level of 1012 cm-2 and heterostructure with undoped barrier layers.
AlGaAs/GaAs solar cell with CNT transport layer: numerical simulation
Authors: Raudik S A , Mozharov A M , Mitin D M , Bolshakov A D , Fedorov V V , Neplokh V V , Rajanna P M , Nasibulin A G , Mukhin I S 
Published: December 2019

Abstract
AlGaAs/GaAs solar cells (SC) was modeled. Conventional SC was compared with structure with the thinner emitter. SC with additional CNT transport layer was simulated and compared with SC without it. The simulation was carried out with different geometry of the contacts and light flux. CNT transport layer has allowed achieving an increase in SCs efficiency up to 1.7% compared with metal contact grid.
Investigation of ITO magnetron deposition effect on carrier lifetime degradation in silicon wafer
Authors: Kudryashov D , Baranov A , Gudovskikh A 
Published: December 2019

Abstract
The effect of ITO magnetron deposition on carrier lifetime in silicon was demonstrated. The method of 2D photoluminescence decay time measurements revealed the lifetime degradation in silicon after magnetron deposition of thin ITO film which is used for top contact in modern solar cells.
Investigation of cryogenic dry etching of silicon on I-V curves of Schottky diodes
Authors: Maximova A , Gudovskikh A , Kudryashov D 
Published: December 2019

Abstract
I-V characteristics of silicon wafer with Schottky contacts were investigated to find out influence of dry plasma etching on defects emerging in the structure. Wafer was divided into two pieces, one of them has affected to cryogenic etching using SF6/O2 (in ratio 5:1) and a pressure 5 mTor for two minutes. The second part of the wafer was used as a reference. It was founded, that for the same contact diameters, etched samples demonstrate higher slope of the I-V curve at the direct voltage. A similar effect was observed in the case of the existence of a defective near-surface region, where carrier recombination is enhanced, which results a significant increase in the direct current.
Transverse mode switching in quantum well-dot lasers triggered by gain saturation
Authors: Payusov A S , Kharchenko A A , Serin A A , Kornyshov G O , Shernyakov Yu M , Mintairov S A , Kalyuzhnyy N A , Maximov M V , Zhukov A E , Gordeev N Yu 
Published: December 2019

Abstract
Having investigated narrow-ridge lasers based on a single layer of InGaAs quantum well-dots emitting at the wavelength of 1.06 μm we have shown anomalous transverse multimode lasing not observed in the broad-area lasers. The effect is shown to be caused by the wavelength shift triggered by the ground state gain saturation.
Multifocal Autofocused Airy Beam Metasurfaces
Authors: Mahdi Shanei M. , Hashemi Mahdieh , Naresh Kumar Reddy A. , Rodríguez Carlos. J. Zapata 
Published: December 2019

Abstract
To focus the incident light, both convex metalenses with hyperbolic phase profile and autofocused Airy (AFA) beams are widely used. To obtain AFA-based bifocal metalenses, we propose two methods in this article. One is to bring the two conjugate focal points of an AFA beam into the real space by applying a proper convex lens phase profile. The other is to use the inefficient central space between the two launched Airy beams with zero amplitude and constant phase profile as an independent metalens. We also show that combining the two introduced methods, leads the design to upgrade to a multifocal structure.
The interaction of an exciton and several optical modes in layer of GaAs
Authors: Belonovskii A V , Morozov K M , Fetisova M V 
Published: December 2019

Abstract
Theoretically, we calculated exciton fraction in polariton modes, which correlates with the intensity of the exciton radiation associated with these modes for several microcavities. Thus, we obtained the form of the dependence of the radiation probability on the eigenfrequencies of the structure.
Ultra high-speed all-optical coherent memory cell
Authors: Bagayev S N , Mekhov I B , Nikolaev V G , Chekhonin I A , Chekhonin M A 
Published: December 2019

Abstract
We study the interaction of two counterpropagating unipolar video pulses of electromagnetic radiation in a dense resonant two-level medium. The pulse durations are less than one oscillation period of an atomic transition. We show that a polariton cluster (i.e. the compact long-living strongly coupled state of electromagnetic field and matter polarization) is created, when two unipolar pulses collide in a resonant medium of the frequency ω0
(the pulses correspond to self-induced transparency solitons of the same amplitudes and opposite polarities).
We have studied for the first time the conditions of maximal excitation of a resonant polarization in the polariton cluster volume. We show that there exist optimal durations and amplitudes of the recording pulses. We studied the processes of double and multiple recording and erasing of an optical memory cell in a thin layer of a resonant medium (quantum dots). We demonstrated that the pulse rate of the recording-erasing pulses can reach 60 000 GHz and higher, which happens under the coherent regime of the interaction between the electromagnetic field and polarization of the medium.
Formation of catalytic centers for the growth of carbon nanostructures for nanophotonics devices
Authors: Klimin V S , Rezvan A A , Morozova J V 
Published: December 2019

Abstract
In this paper, we studied the effect of heating temperature on the geometric parameters of catalytic centers. The temperature range was from 600 to 900 °C with an interval of 50 °C, heating was carried out for 20 minutes. At the end of the experimental studies, the AFM and SEM images of the catalytic centers formed at various heating temperatures on the Ni/V/Si structure are presented. Based on the data obtained, the corresponding dependences of the packing density, height range and areas of catalytic centers on temperature were constructed. It was determined that the catalytic centers have the smallest volume of 0.5 nm3 and a diameter of 80 nm at a heating temperature in the range from 750 °C to 850 °C, which is caused by their uniformity and geometric shape.
Interpretation of photoluminescence spectra of metamorphic InAlAs/GaAs heterostructures
Authors: Denisova G A , Firsov D D , Komkov O S 
Published: December 2019

Abstract
The results of analyzing the photoluminescence spectra of metamorphic In0.75Al0.25As/In0.05-0.8Al0.95-0.2As/GaAs heterostructures grown by molecular-beam epitaxy method are presented. In the spectra of low-temperature photoluminescence, three emission peaks have been detected, which correspond to carrier recombination in different areas of the structure. These include a part of the In0.75Al0.25As “virtual substrate” grown at high temperature, and the area of a triangular potential well formed by the meta-morphic buffer layer and the “virtual substrate”. Photoluminescence related to defects in the high-temperature part of the “virtual substrate” was also measured.
CMOS compatible nanoantenna-nanodiamond integration
Authors: Komrakova S , Javadzade J , Vorobyov V , Bolshedvorskii S , Soshenko V , Akimov A , Kovalyuk V , Korneev A , Goltsman G 
Published: December 2019

Abstract
Here we demonstrate CMOS compatible method to deterministically produce nanoantenna with nanodiamonds systems on example of bull-eye antenna on top of on hyperbolic metamaterials. We study the statistics of the placement of nanodiamonds and measure the fluorescence lifetime and the second-order correlation function of NV-centers inside nanodiamonds.
Magneto-optical properties of easy-plane and easy-axis garnet ferrite films for eddy current testing
Authors: Lugovskoy N.V. , Berzhansky V.N. , Semuk E.Yu. , Lyashko S.D. , Shaposhnikov A.N. , Evtukhova E.A. , Mikhailova T.V. 
Published: December 2019

AbstractThe paper presents the magnetic, optical and magneto-optical properties of easy-plane and easy-axis films on the base of Bi-garnet. The possibilities and features of the operation of these films as sensors in eddy current magneto-optical introscopy are shown on the example of visualization of linear defects in products made from aluminum alloys.
Simulation of induction heating of a titanium sample in a container with a carbon-containing medium and determination of the amount of heat losses during chemical heat treatment
Authors: Voyko A , Fomina M 
Published: December 2019

Abstract
In this work, the process of induction heating of a container with a titanium sample in a carbon-containing medium was simulated using the finite element method. The dependence of the inductor current I and the duration of treatment on the heating kinetics T(I,t) of the “inductor – container – sample” system taking into account the heat losses QL(I, T) on the process of chemical-thermal treatment of titanium was established.