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Investigation of the Extraordinary Phase Transition in Antiferromagnetic Thin Films: Computer Simulation 研究反铁磁性薄膜中的非凡相变：计算机模拟
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-05-02 DOI: 10.1134/S0030400X24700243
S. V. Belim, E. V. Bogdanova
{"title":"Investigation of the Extraordinary Phase Transition in Antiferromagnetic Thin Films: Computer Simulation","authors":"S. V. Belim,&nbsp;E. V. Bogdanova","doi":"10.1134/S0030400X24700243","DOIUrl":"10.1134/S0030400X24700243","url":null,"abstract":"<p>The extraordinary phase transition in antiferromagnetic thin films has been analyzed by computer simulation. The simulation has been performed using the Ising model and the Metropolis algorithm. Epitaxial films with a cubic lattice containing several monoatomic layers have been considered. The condition for the occurrence of surface and extraordinary phase transitions is the difference between the exchange integrals in the bulk of the film and on its surface. It is shown that the surface and extraordinary phase transitions occur in antiferromagnetic thin films containing no less than eight monoatomic layers. The extraordinary phase transition has been investigated for different film thicknesses. It is shown that the magnetic susceptibility near the phase transition line has a logarithmic dependence on the phase-transition temperature. The dependence of the critical indices of the logarithmic phase on the film thickness is obtained.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 11","pages":"1137 - 1142"},"PeriodicalIF":0.8,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Influence of Surface Roughness on Photonic-Nanojet Parameters of Dielectric Microspheres 表面粗糙度对介质微球光子纳米射流参数的影响
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-10 DOI: 10.1134/S0030400X24700097
Yu. E. Geints, E. K. Panina
{"title":"The Influence of Surface Roughness on Photonic-Nanojet Parameters of Dielectric Microspheres","authors":"Yu. E. Geints,&nbsp;E. K. Panina","doi":"10.1134/S0030400X24700097","DOIUrl":"10.1134/S0030400X24700097","url":null,"abstract":"<p>All naturally found and man-made solid microparticles have a rough surface. Upon optical radiation scattering from such particles, in addition to geometric shape, the surface texture becomes an important morphological factor of the scatterer that determines its optical properties. We present the results of numerical FDTD simulation of an optical-wave focusing by a dielectric microsphere with a randomly distributed surface roughness. The cases of azimuthally symmetric and asymmetric distortions of the particle surface are analyzed. It is demonstrated that the key parameters of the near-field focal region (intensity, longitudinal and transverse dimensions, focal distance) referred to as the photonic nanojet (PNJ) turn out to be sensitive to changes in the sphere-surface texture. In the process, two parameters, the peak intensity of the PNJ and its length, experience the largest changes. The influence of the optical contrast (the relative refractive index) of the microsphere that scatters radiation on PNJ characteristics is analyzed, and the possibility of reducing the influence of surface roughness on the quality of the near-field focusing by means of microsphere watering (water-uptake) is demonstrated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 11","pages":"1113 - 1121"},"PeriodicalIF":0.8,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of Luminescent and Mesogenic Properties of Europium(III) Binuclear Complexes According to Quantum Chemical Calculations 根据量子化学计算评估铕（III）双核配合物的发光和介电性质
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-10 DOI: 10.1134/S0030400X24700103
K. A. Romanova, Yu. G. Galyametdinov
{"title":"Evaluation of Luminescent and Mesogenic Properties of Europium(III) Binuclear Complexes According to Quantum Chemical Calculations","authors":"K. A. Romanova,&nbsp;Yu. G. Galyametdinov","doi":"10.1134/S0030400X24700103","DOIUrl":"10.1134/S0030400X24700103","url":null,"abstract":"<p>The paper has shown the possibility of a comprehensive quantum chemical study of the molecular structure and energies of the excited states of the mesogenic europium(III) binuclear complexes with substituted β-diketones and Lewis bases. The interrelationships between the geometric parameters of complex molecules and the structural features of coordination polyhedra and the probability of their manifestation of liquid crystalline properties have been studied. The structural features of the first coordination sphere of binuclear complexes have been considered and the calculated parameters of Voronoi–Dirichlet polyhedra have been compared with the data for the mononuclear complexes. On the basis of the results of the calculations of the lowest singlet and triplet excited states, the diagrams of energy levels have been constructed, the main channels of intramolecular excitation energy transfer have been determined, and the luminescence efficiency of compounds luminescence efficiency has been evaluated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 11","pages":"1122 - 1129"},"PeriodicalIF":0.8,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of Photonic Nanojets by Two-Dimensional Microprisms 二维微棱镜形成光子纳米射流
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-10 DOI: 10.1134/S0030400X24700115
V. D. Zaitsev, S. S. Stafeev, V. V. Kotlyar
{"title":"Formation of Photonic Nanojets by Two-Dimensional Microprisms","authors":"V. D. Zaitsev,&nbsp;S. S. Stafeev,&nbsp;V. V. Kotlyar","doi":"10.1134/S0030400X24700115","DOIUrl":"10.1134/S0030400X24700115","url":null,"abstract":"<p>The focusing of laser radiation with triangular dielectric prisms has been numerically studied using the finite element method implemented in the COMSOL Multiphysics software package. It has been shown that two-dimensional triangular prisms make it possible to focus light in free space into spots smaller than the scalar diffraction limit. For example, a quartz glass prism with a base width of 60 μm and a height of 28.5 μm illuminated by light with a wavelength of 4 μm produces a photonic nanojet with the maximum intensity that exceeds the incident radiation intensity by a factor of 6 and has a full width at half maximum of 0.38 of the focused radiation wavelength. The focal spot size can be decreased by selecting the height of the prism so as to the maximum intensity was located inside it. In particular, a barium titanate prism with a height of 21 μm and a base width of 60 μm forms a focal spot directly behind its apex with a width at half maximum equal to 0.25 of the focused radiation wavelength. It has been shown that the use of a prism weakens the wavelength dependence of the focal spot width as compared with the case of a microcylinder. In particular, for a quartz glass microcylinder 60 μm in diameter, a change in the wavelength from 3 to 5 μm leads to the spot width variation by 0.09 of the focused radiation wavelength, while for a prism, by 0.05 of the focused radiation wavelength on average.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 11","pages":"1130 - 1136"},"PeriodicalIF":0.8,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Parameters of Transparent Conducting Periodic Structures Manufactured by Laser Ablation 激光烧蚀制造透明导电周期结构的参数研究
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23060139
S. A. Ostrikov, P. A. Nosov, P. A. Mikhalev, M. O. Makeev, A. S. Provatorov, A. V. Korolkov
{"title":"Investigation of Parameters of Transparent Conducting Periodic Structures Manufactured by Laser Ablation","authors":"S. A. Ostrikov,&nbsp;P. A. Nosov,&nbsp;P. A. Mikhalev,&nbsp;M. O. Makeev,&nbsp;A. S. Provatorov,&nbsp;A. V. Korolkov","doi":"10.1134/S0030400X23060139","DOIUrl":"10.1134/S0030400X23060139","url":null,"abstract":"<p>In this paper we report on results of an investigation of a transparent mesh electrode in a wide wavelength range 550–2000 nm with low electrical resistance manufactured by laser ablation with using an aluminum film with a thickness of 30 pm on a polyimide substrate with a thickness of 20 μm. The method is implemented using a fiber ytterbium nanosecond laser with a wavelength of radiation 1064 nm. The structure we have obtained has a transmittance &gt;50% in the designated spectrum range and the electrical resistance &lt;1.5 Ω/sq.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 8","pages":"723 - 727"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of Individual and Average Characteristics of Native Blood Erythrocytes by the Static Spectral Digital Microscopy Method 用静态光谱数字显微镜方法确定原血红细胞的个体和平均特征
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23070044
V. A. Doubrovski, S. O. Torbin, I. V. Zabenkov
{"title":"Determination of Individual and Average Characteristics of Native Blood Erythrocytes by the Static Spectral Digital Microscopy Method","authors":"V. A. Doubrovski,&nbsp;S. O. Torbin,&nbsp;I. V. Zabenkov","doi":"10.1134/S0030400X23070044","DOIUrl":"10.1134/S0030400X23070044","url":null,"abstract":"<p>The method of static (non-flow) spectral digital microscopy (SSDM) method to identify, to count and to determine the standard and individual characteristics of native blood erythrocytes is suggested. The object to study was the whole donor blood diluted by saline and placed into the counting Goryaev camber. Among the standard characteristics of erythrocytes, the following were determined: the concentration of erythrocytes in a blood sample RBC (Red Blood Cells concentration), the scatter of erythrocytes by volume RDW (Red cells Distribution Width), including RDW-SD and RDW-CV, hematocrit HCT, mean erythrocyte volume MCV (Mean Cell Volume). n addition, the possibility of measuring the average hemoglobin content in erythrocyte MCH (Mean Cell Hemoglobin), MCHC (Mean Corpuscular Hemoglobin Concentration), as well as the total content of hemoglobin HGB in the blood sample (Hemoglobin) was investigated. The peculiarity of SSCM method proposed lies in the fact that it fundamentally allows to determine not only the general hematological characteristics of blood samples (RBC, RDW-SD and RDW-CV, HGB), but also the mean values of the characteristics of native blood erythrocytes (MCV, MCH, MCHC), and also, and most importantly, the individual characteristics of each erythrocyte. The latter permitted the authors to introduce a new type of erythrocyte characteristics ICV, ICH, ICHC (Individual Cell Volume, Individual Cell Hemoglobin, Individual Corpuscular Hemoglobin Concentration). In turn, this made it possible to obtain the histograms of hemoglobin distribution in erythrocytes of a blood sample along with the traditional distribution of their volumes, which can serve as an additional tool in the field of hemodiagnostics. Thus, the paper shows that SSCM method makes it possible to compile an individual metrological “passport” for each erythrocyte of the blood sample under study—this is the main feature of this work.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 9","pages":"803 - 814"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral Study of the Structure and Properties of Complexes of Unsubstituted Indoline Spiropyran with Aluminum Ions 未取代吲哚啉-螺吡喃与铝离子络合物的结构和性质的光谱研究
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23100028
N. E. Belikov, A. Yu. Lukin, S. D. Varfolomeev, I. I. Levina, L. E. Petrovskaya, O. V. Demina, V. A. Barachevsky, A. A. Khodonov
{"title":"Spectral Study of the Structure and Properties of Complexes of Unsubstituted Indoline Spiropyran with Aluminum Ions","authors":"N. E. Belikov,&nbsp;A. Yu. Lukin,&nbsp;S. D. Varfolomeev,&nbsp;I. I. Levina,&nbsp;L. E. Petrovskaya,&nbsp;O. V. Demina,&nbsp;V. A. Barachevsky,&nbsp;A. A. Khodonov","doi":"10.1134/S0030400X23100028","DOIUrl":"10.1134/S0030400X23100028","url":null,"abstract":"<p>The methods of absorption electronic and NMR spectroscopy were used to study the processes of complexation during the interaction of molecules of unsubstituted indoline spiropyran with aluminum salts. The mechanism of formation and structure of complexes of two types has been established. Negative photochromism of the complex of the merocyanine form of spiropyran with aluminum ions was found. The stability of metal complexes to the action of various agents has been investigated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 10","pages":"938 - 946"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Focusing Diffraction Optics for Orbital Telescopes 轨道望远镜的聚焦衍射光学器件
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23100132
V. V. Lider
{"title":"Focusing Diffraction Optics for Orbital Telescopes","authors":"V. V. Lider","doi":"10.1134/S0030400X23100132","DOIUrl":"10.1134/S0030400X23100132","url":null,"abstract":"<p>The review is devoted to the principles, state of the art and problems of diffractive optics used to focus X-ray and γ-radiation in telescopes at orbital stations. Various multilayer structures for normal incidence telescopes, supermirrors for Wolter optics, Laue lens as a soft γ-radiation concentrator, as well as modified Fresnel zone plates for focusing radiation in a wide energy range with an unprecedented high angular resolution (10<sup>–1</sup>–10<sup>–3</sup>″).</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 10","pages":"1016 - 1042"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Study of the Optical Nonlinear Properties of Bulk ZnSe for Immersion Applications 用于浸入式应用的块状硒化锌的光学非线性特性研究
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23100235
N. A. Smirnov, A. E. Rupasov, S. N. Shelygina, A. O. Levchenko, M. S. Savinov, S. I. Kudryashov
{"title":"The Study of the Optical Nonlinear Properties of Bulk ZnSe for Immersion Applications","authors":"N. A. Smirnov,&nbsp;A. E. Rupasov,&nbsp;S. N. Shelygina,&nbsp;A. O. Levchenko,&nbsp;M. S. Savinov,&nbsp;S. I. Kudryashov","doi":"10.1134/S0030400X23100235","DOIUrl":"10.1134/S0030400X23100235","url":null,"abstract":"<p>In this work, we study the nonlinear absorption of ultrashort laser pulses of variable duration (0.3‒10 ps) in a bulk polycrystalline ZnSe dielectric. The transmission of the sample was measured for two wavelengths, 515 and 1030 nm, in a wide range of intensities. A nonlinear behavior of the transmission is found when the sample is irradiated with laser radiation at a wavelength of 515 nm with absorption saturation in the region of 3–5 TW/cm<sup>2</sup>. Surface damage thresholds were obtained for a wavelength of 1030 nm for pulse durations of 0.3–10 ps.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 10","pages":"1093 - 1097"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reactivity of Stress-Implementing System under Conditions of Light Regime Change in Experiment 实验中光照变化条件下应力实施系统的反应能力
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-04-01 DOI: 10.1134/S0030400X23060206
O. V. Zlobina, S. S. Pahomiy, I. O. Bugaeva, A. N. Ivanov, A. O. Moskvina, E. M. Kostromina
{"title":"Reactivity of Stress-Implementing System under Conditions of Light Regime Change in Experiment","authors":"O. V. Zlobina,&nbsp;S. S. Pahomiy,&nbsp;I. O. Bugaeva,&nbsp;A. N. Ivanov,&nbsp;A. O. Moskvina,&nbsp;E. M. Kostromina","doi":"10.1134/S0030400X23060206","DOIUrl":"10.1134/S0030400X23060206","url":null,"abstract":"<p>Influence of light exposure duration (model 18 : 6) on hormonal indices of stress-implementing system in laboratory animals blood is studied. Activity of stress systems central link was evaluated based on data on concentration of adrenocorticotrophic hormone, melatonin and β-endorphin in blood serum, observed during enzyme immunoassay. Reaction of peripheric link of the stress-implementing system was evaluated in blood smears based on results of qualitative count of catecholamine granules in erythrocytes. It was established, that variations of hormonal indices of the stress systems for laboratory animals depend on trigger factor activity periods. With increase of the experiment duration to 21st days the most pronounced reduction of melatonin, β-endorphin and increase of adrenocorticotrophic hormone concentration, as well as sharp increase of catecholamines level are observed in the blood serum. These hormonal changes develop as a result of failure of compensation mechanisms of the stress-implementing systems in connection with melatonin rhythms disturbance, that indicates the gradual development of the general adaptation syndrome.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"131 8","pages":"781 - 784"},"PeriodicalIF":0.8,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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