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Optical Memory and Neural Networks最新文献

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Spin Hall Effect of Laguerre-Gaussian and Bessel-Gaussian Beams Superimposed with Linearly Polarized Beams 拉盖尔-高斯和贝塞尔-高斯光束与线偏振光束叠加的自旋霍尔效应
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700346
A. A. Kovalev, V. V. Kotlyar
{"title":"Spin Hall Effect of Laguerre-Gaussian and Bessel-Gaussian Beams Superimposed with Linearly Polarized Beams","authors":"A. A. Kovalev,&nbsp;V. V. Kotlyar","doi":"10.3103/S1060992X24700346","DOIUrl":"10.3103/S1060992X24700346","url":null,"abstract":"<p>We investigate the spin angular momentum of a superposition of two vector light beams with rotational symmetry. One beam is cylindrically polarized and another is linearly polarized. Radial form of these beams can be arbitrary (Laguerre-Gaussian, Bessel-Gaussian, or some other). For such a superposition, an analytical expression is derived for the spin angular momentum and two its properties are obtained. At first, we found that altering the coefficients does not affect the form of the spin angular momentum distribution, while the intensity distribution is changed. At second, we found that maximal spin angular momentum is generated if both beams are of equal power.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S98 - S104"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mode Analysis and Characterization of Absorptive Interference Resonators 吸收式干涉谐振器的模态分析与特性研究
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700437
D. V. Nesterenko, S. Hayashi, V. A. Soifer
{"title":"Mode Analysis and Characterization of Absorptive Interference Resonators","authors":"D. V. Nesterenko,&nbsp;S. Hayashi,&nbsp;V. A. Soifer","doi":"10.3103/S1060992X24700437","DOIUrl":"10.3103/S1060992X24700437","url":null,"abstract":"<p>The description of the role of absorption in interference resonators is important for characterization of metal-insulator-metal structures. To study the resonance characteristics of the interference structures the conditions of excitation of their eigenmodes were analyzed. The mode excitation conditions determined by the dispersion relations were obtained for the waveguide, Fabry-Pérot, symmetric and antisymmetric plasmonic normal modes. The approximations of the dispersion relations in the form of analytical functions were implemented to describe the behavior of the resonance positions in far-field spectra depending on the parameters of the layers.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S181 - S188"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elements of Diffraction Sensory 衍射传感器元件
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700371
V. A. Danilov
{"title":"Elements of Diffraction Sensory","authors":"V. A. Danilov","doi":"10.3103/S1060992X24700371","DOIUrl":"10.3103/S1060992X24700371","url":null,"abstract":"<p>Various types of diffraction and plasmonic elements are discussed that provide modern development of sensors in different applications such as analysis of the mode composition of radiation and wavefront aberrations based on multichannel filters, detection of the polarization state using diffraction microstructures, as well as biochemical analysis using metal-insulator-metal waveguides. The considered types of sensors are promising in the field of optical communications, quantum information, materials testing, environmental monitoring.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S123 - S138"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Semispherical Conservation of Topological Charge in Scalar Diffraction Theory 标量衍射理论中拓扑电荷的半球形守恒
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700401
A. Mingazov, M. Mingazova, L. Doskolovich
{"title":"Semispherical Conservation of Topological Charge in Scalar Diffraction Theory","authors":"A. Mingazov,&nbsp;M. Mingazova,&nbsp;L. Doskolovich","doi":"10.3103/S1060992X24700401","DOIUrl":"10.3103/S1060992X24700401","url":null,"abstract":"<p>Topological charge is an important characteristic of a laser beam and is closely related to orbital angular momentum. Although in most cases the charge is conserved when a beam propagates in space, the opposite examples are known. We formulate and prove a general theorem for conservation of topological charge, which involves not only charges in the plane perpendicular to the propagation axis, but also in planes parallel to the propagation axis. Charges of the second type can be identified to some approximation with spatiotemporal charge, which have been widely studied in recent years.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S158 - S166"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of Osteoporotic Changes of Vertebral Bodies on Computed Tomography Images Based on the Analysis of Groups of Textural Features 基于纹理特征群分析的计算机断层图像中椎体骨质疏松变化的识别
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700462
M. Ya. Lyakin, N. Yu. Ilyasova, E. N. Alekhin, N. S. Demin
{"title":"Identification of Osteoporotic Changes of Vertebral Bodies on Computed Tomography Images Based on the Analysis of Groups of Textural Features","authors":"M. Ya. Lyakin,&nbsp;N. Yu. Ilyasova,&nbsp;E. N. Alekhin,&nbsp;N. S. Demin","doi":"10.3103/S1060992X24700462","DOIUrl":"10.3103/S1060992X24700462","url":null,"abstract":"<p>The study presented in this paper is devoted to the development of technology for detecting osteoporotic changes in vertebral bodies according to computed tomography data based on the analysis of groups of textural features. This technology will be of interest to radiologists when assessing the structure of vertebral bodies in patients with osteoporosis, and especially in patients with malignant neoplasms, in which the disease proceeds with a decrease in bone mineral density. Automation of the analysis process will significantly reduce the time spent by a radiologist on the evaluation of vertebral bodies, including when evaluating the effectiveness of osteoporosis treatment. During the development process, the most informative group of signs was identified, which allows achieving high accuracy in detecting signs of osteoporotic changes in the vertebral bodies in 94.5%.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S209 - S216"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Analysis of Wavefront Approximation Accuracy by Means of Zernike Polynomials for Optical Surface Flatness Measurements Using a Hartmannometer Device 利用哈特曼计测量光学表面平整度的波前逼近精度的Zernike多项式数值分析
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700395
I. V. Galaktionov, A. N. Nikitin, J. V. Sheldakova, V. V. Toporovsky, A. V. Kudryashov
{"title":"Numerical Analysis of Wavefront Approximation Accuracy by Means of Zernike Polynomials for Optical Surface Flatness Measurements Using a Hartmannometer Device","authors":"I. V. Galaktionov,&nbsp;A. N. Nikitin,&nbsp;J. V. Sheldakova,&nbsp;V. V. Toporovsky,&nbsp;A. V. Kudryashov","doi":"10.3103/S1060992X24700395","DOIUrl":"10.3103/S1060992X24700395","url":null,"abstract":"<p>A metrological device—Hartmannometer—based on a Shack-Hartmann wavefront sensor for measuring the flatness of optical surfaces was developed and researched, and the results were compared with the results obtained from measurements using a Fizeau interferometer. The paper presents a method for calibrating a Hartmannometer, and also compares the results of measuring a test optical surface using the developed device and a classical Fizeau interferometer. The total amplitude of wavefront distortions measured using a Fizeau interferometer was 0.127 μm (standard deviation 0.022 μm). The Hartmannometer showed distortions amplitude of 0.131 µm (standard deviation 0.024 µm).</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S146 - S157"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photoinduced Anisotropy Peculiarities of Holographic Gratings Recorded in PEPC-co-SY3 Azopolymer PEPC-co-SY3偶氮聚合物全息光栅的光致各向异性特性
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700450
E. Achimova, A. Meshalkin, V. Abaskin, C. Losmanschii, V. V. Podlipnov, V. Botnari, A. Prisacar
{"title":"Photoinduced Anisotropy Peculiarities of Holographic Gratings Recorded in PEPC-co-SY3 Azopolymer","authors":"E. Achimova,&nbsp;A. Meshalkin,&nbsp;V. Abaskin,&nbsp;C. Losmanschii,&nbsp;V. V. Podlipnov,&nbsp;V. Botnari,&nbsp;A. Prisacar","doi":"10.3103/S1060992X24700450","DOIUrl":"10.3103/S1060992X24700450","url":null,"abstract":"<p>In this work, we studied the photoinduced polarimetric and optical properties of the photosensitive carbazole-based azopolymer prepared in the form of thin films. Poly-N-(2,3-epoxypropyl)carbazole was used as a polymer matrix, which was copolymerized with the commercially available azo dye Solvent Yellow 3. Thin films of µm thicknesses were obtained by home-made rod-coating techniques. Polarization holographic recording was applied for direct diffraction gratings patterning. The polarization states of the recording beams were P–P, S–S, ±45° and left-right circular. The optical path of the probe beam passing through investigating media is defined by the summary changes in surface topography and volume anisotropy. The periodically modulated polarization/amplitude interference patterns produced by the gratings were investigated by in situ measurements of the diffraction efficiency (DE) kinetics in the first diffraction order at the DE saturation value. The surface relief was measured by AFM. A comparison of the behavior of azopolymer films during the recording of diffraction gratings with different polarization configurations of recording beams was carried out. The presented results confirm the possibility of recording not only the amplitude and phase of light, as in scalar holography, but also the polarization states of interfering beams. The angular dependences of the probe beam azimuth and ellipticity were analyzed, and some peculiarities of azopolymer photoinduced changes are discussed.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S198 - S208"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Influence of Aberration Distortions on the Intensity Pattern of Gauss-Laguerre Modes 像差畸变对高斯-拉盖尔模式光强分布的影响分析
IF 1
Optical Memory and Neural Networks Pub Date : 2024-12-11 DOI: 10.3103/S1060992X24700322
M. I. Pomeshchikov
{"title":"Analysis of the Influence of Aberration Distortions on the Intensity Pattern of Gauss-Laguerre Modes","authors":"M. I. Pomeshchikov","doi":"10.3103/S1060992X24700322","DOIUrl":"10.3103/S1060992X24700322","url":null,"abstract":"<p>Determining the order of a vortex beam is an important problem in optics. One way is to insert an astigmatic distortion. However, other types of aberrations, such as coma, can also be useful in determining the topological charge of a vortex beam. The influence of the type and magnitude of aberrations on the distortion of the intensity pattern of vortex beams is investigated using Gauss-Laguerre modes of different orders.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 1 supplement","pages":"S75 - S89"},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two Frequency-Division Demultiplexing Using Photonic Waveguides by the Presence of Two Geometric Defects 利用存在两个几何缺陷的光子波导进行两次频分复用
IF 1
Optical Memory and Neural Networks Pub Date : 2024-09-26 DOI: 10.3103/S1060992X24700218
El-Aouni Mimoun, Ben-Ali Youssef, El Kadmiri Ilyass, Ouariach Abdelaziz, Bria Driss
{"title":"Two Frequency-Division Demultiplexing Using Photonic Waveguides by the Presence of Two Geometric Defects","authors":"El-Aouni Mimoun,&nbsp;Ben-Ali Youssef,&nbsp;El Kadmiri Ilyass,&nbsp;Ouariach Abdelaziz,&nbsp;Bria Driss","doi":"10.3103/S1060992X24700218","DOIUrl":"10.3103/S1060992X24700218","url":null,"abstract":"<p>This paper presents a theoretical work of a new device concept for frequency division demultiplexing with excellent performance based on waveguides system containing segments and loops in the presence of two geometrics defects. This system permits the separation of two frequency, based on 1<i>D</i> photonic waveguides loops structures. The system under consideration possesses a Y‑shaped demultiplexer configuration, consisting of a single input and two output channels (transmission lines). Each output channel contains an alternating unit cell consisting of a segment and a loop. The creation of a geometrical defect at the segment level in the middle of each output line allows the creation of two defect modes inside the bandgaps. The numerical results show that this demultiplexer system is able to separate two signals (electromagnetic waves) of different frequencies and guide each signal through an output channel. We perform the analytical calculation of the transmission rates <i>T</i><sub>1</sub>, <i>T</i><sub>2</sub>, and reflection R using the interface response theory, which is based on Green’s function method for the proposed demultiplexer system. The proposed device offers high transmission efficiency, high quality factor and a large frequency difference between defect modes, hence, it is highly desirable for frequency division demultiplexing applications.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 3","pages":"326 - 338"},"PeriodicalIF":1.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Georeferencing Remote Sensing Data Using Long Gradients 利用长梯度对遥感数据进行地理参照
IF 1
Optical Memory and Neural Networks Pub Date : 2024-09-26 DOI: 10.3103/S1060992X24700140
M. V. Gashnikov
{"title":"Georeferencing Remote Sensing Data Using Long Gradients","authors":"M. V. Gashnikov","doi":"10.3103/S1060992X24700140","DOIUrl":"10.3103/S1060992X24700140","url":null,"abstract":"<p>The paper investigates algorithms using long intensity gradients for georeferencing of Earth remote sensing data. The case is considered in which one “reliable” referenced set of remote sensing data is already known for a particular area. New input data are referenced to this “reliable” set by detecting resemblant fragments in the “relible” data set and new remote sensing data. A set of pairs of resemblant fragments makes it possible to calculate the transformation parameters of new data. To increase the efficiency of resemblant fragments detection, we go to the space of long intensity gradients, which makes the georeferencing method more stable to admissible differences between resemblant fragments. The paper considers a few algorithms of going to the long gradient space and compares them. The computaional experiment provides grounds for recommending the best way of going to the long gradient space.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"33 3","pages":"255 - 258"},"PeriodicalIF":1.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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