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Temperature Dependence of the Spectra of Optical Constants of CdTe in the Region of the Absorption Edge 吸收边缘区域碲化镉光学常数光谱的温度依赖性
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24040143
V. A. Shvets, D. V. Marin, M. V. Yakushev, S. V. Rykhiitskii
{"title":"Temperature Dependence of the Spectra of Optical Constants of CdTe in the Region of the Absorption Edge","authors":"V. A. Shvets,&nbsp;D. V. Marin,&nbsp;M. V. Yakushev,&nbsp;S. V. Rykhiitskii","doi":"10.1134/S0030400X24040143","DOIUrl":"10.1134/S0030400X24040143","url":null,"abstract":"<p>In this work, the spectra of optical constants of epitaxial layers of cadmium telluride near the fundamental absorption edge are studied. For this purpose, ellipsometric measurements of the layers under study were carried out in a vacuum chamber in the temperature range from <i>T</i> = 38–275°C. A numerical algorithm has been developed for solving the inverse ellipsometry problem for the structures under consideration, with the help of which the spectral dependences of the refractive index <i>n</i>(λ) and absorption index <i>k</i>(λ) are determined in the wavelength range from 700 to 1000 nm. The parametric dependences of <i>k</i>(λ, <i>T</i>) in the fundamental absorption region and in the transparency region are presented. The presence of an extended absorption tail in the transparency region was established, presumably associated with imperfections in the crystal structure.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"403 - 408"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213930","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
Estimate of the Rate of Collisional-Radiative Recombination of Doubly Charged Ne++ Ions from the Results of a Spectroscopic Experiment 从光谱实验结果估算双电荷 Ne++ 离子的碰撞辐射重组率
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X2404009X
V. A. Ivanov
{"title":"Estimate of the Rate of Collisional-Radiative Recombination of Doubly Charged Ne++ Ions from the Results of a Spectroscopic Experiment","authors":"V. A. Ivanov","doi":"10.1134/S0030400X2404009X","DOIUrl":"10.1134/S0030400X2404009X","url":null,"abstract":"<p>An experiment was set up to study the afterglow of an extended barrier discharge in low-pressure neon containing Ne<sup>+</sup>, Ne<sup>2+</sup>, and Ne<sup>++</sup> ions by kinetic spectroscopy. Observation conditions: neon pressure ~0.8–1.7 Torr, electron density in the afterglow stage [<i>e</i>] ~ 10<sup>11</sup> cm<sup>–3</sup>. In order to compare the rates of collisional-radiative recombination of Ne<sup>+</sup> and Ne<sup>++</sup> ions, the effect of pulsed “heating” of decaying plasma electrons by a weak high-frequency field on the intensities of atomic and ion lines was observed. The presented data show that in such a plasma, short-term suppression of recombination processes by electron heating leads to an increase in the brightness of spectral lines in the atomic and ion afterglow spectra, and the reaction of the lines of the latter turns out to be much stronger. Based on simple estimates, it is shown that this effect is due to the difference in the recombination rates of the Ne<sup>+</sup> and Ne<sup>++</sup> ions, and this difference turns out to be beyond the scope of theoretical concepts.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"371 - 377"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227020","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
Ab Initio Calculations of the Electronic Structure of the Doublet and Quartet States of the Rubidium Trimer 铷三聚体双态和四态电子结构的 Ab Initio 计算
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24030044
E. A. Bormotova, A. S. Likharev, A. V. Stolyarov
{"title":"Ab Initio Calculations of the Electronic Structure of the Doublet and Quartet States of the Rubidium Trimer","authors":"E. A. Bormotova,&nbsp;A. S. Likharev,&nbsp;A. V. Stolyarov","doi":"10.1134/S0030400X24030044","DOIUrl":"10.1134/S0030400X24030044","url":null,"abstract":"<p>Systematic quantum chemical calculations were performed for the ground and a number of low-lying electronically excited doublet and quartet states of the rubidium trimer molecule. The obtained potential energy surfaces (PES), spin-orbit couplings (SOC) and electronic transition dipole moments (ETDM) can be useful for optimizing paths for laser synthesis, cooling and manipulation of stable ensembles of Rb<sub>3</sub> molecules at ultralow temperatures. Ab initio calculations of the electronic structure of the homonuclear Rb<sub>3</sub> molecule, in linear, isosceles triangle and equilateral triangle geometries, were performed using the multi-reference configuration interaction method, taking into account single and double excitations (M-R‑CISD) and with explicit dynamic correlation of only the three valence electrons. The structure of each atom was approximated using a nine-electron effective core potential (ECP28MDF), and molecular orbitals (MOs) were optimized using the spin averaged (over doublet and quartet states) multi-configuration self-consistent field (SA-CASSCF) method. Core–valence correlations between twenty-four subvalence electrons located on doubly occupied MOs and three valence electrons were implicitly taken into account using a one-electron angular momentum-independent Müller–Mayer core polarization potential (CPP). As a result of topological investigations at over 35 000 points, two dimensional PES, SOC, and ETDM functions were obtained and the geometric parameters Rb<sub>3</sub> were found at which the most intense vertical transitions and the maximum influence of the SOC are expected.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 3","pages":"223 - 233"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213870","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
Virus Diagnostics Using Fabry–Pérot Interference Films of Macroporous Silicon 利用大孔硅的法布里-佩罗干涉膜进行病毒诊断
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24030093
K. A. Gonchar, N. Yu. Saushkin, I. I. Tsiniaikin, A. A. Eliseev, A. S. Gambaryan, J. V. Samsonova, L. A. Osminkina
{"title":"Virus Diagnostics Using Fabry–Pérot Interference Films of Macroporous Silicon","authors":"K. A. Gonchar,&nbsp;N. Yu. Saushkin,&nbsp;I. I. Tsiniaikin,&nbsp;A. A. Eliseev,&nbsp;A. S. Gambaryan,&nbsp;J. V. Samsonova,&nbsp;L. A. Osminkina","doi":"10.1134/S0030400X24030093","DOIUrl":"10.1134/S0030400X24030093","url":null,"abstract":"<p>In this paper, the possibility of detecting viruses, specifically influenza A virus, based on changes in the spectra of total reflection from macroporous silicon (macro-<i>p</i>Si) films, is demonstrated for the first time. Macro-<i>p</i>Si films with a pore diameter of about 100 nm were produced by electrochemical etching of crystalline silicon substrates. The porosity of the macro-<i>p</i>Si, calculated using the Bruggeman effective medium model, was 75%. Electron microscopy showed that such highly porous films adsorb of 50–100 nm in size viruses on their surface and inside the pores, but the efficiency of adsorption significantly increases when the surface of the nanostructures is functionalized with monoclonal antibodies, providing specific binding of viruses. The reflection spectra of macro-<i>p</i>Si films demonstrate a series of interference fringes, the intensity of which dramatically changes upon virus adsorption. The results obtained demonstrate the possibility of a simple and effective optical method for virus diagnostics using Fabry–Pérot interference in macro<i>‑p</i>Si films.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 3","pages":"252 - 256"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213874","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
Autler–Townes Effect of Autoionization Transition at Laser Separation of Lutetium Isotopes 激光分离镥同位素时的自电离转变的 Autler-Townes 效应
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24040052
A. B. D’yachkov, A. A. Gorkunov, S. K. Kovalevich, A. V. Labozin, V. A. Firsov, S. V. Fomichev, G. O. Tsvetkov, V. Ya. Panchenko
{"title":"Autler–Townes Effect of Autoionization Transition at Laser Separation of Lutetium Isotopes","authors":"A. B. D’yachkov,&nbsp;A. A. Gorkunov,&nbsp;S. K. Kovalevich,&nbsp;A. V. Labozin,&nbsp;V. A. Firsov,&nbsp;S. V. Fomichev,&nbsp;G. O. Tsvetkov,&nbsp;V. Ya. Panchenko","doi":"10.1134/S0030400X24040052","DOIUrl":"10.1134/S0030400X24040052","url":null,"abstract":"<p>The splitting of the transition from a discrete to an autoionization state, used in a three-step photoionization scheme of lutetium 5<i>d</i>6<i>s</i><sup>2 2</sup><i>D</i><sub>3/2</sub>–5<i>d</i>6<i>s</i>6<i>p</i> <span>({}^{4}F_{{5/2}}^{^circ })</span>–5<i>d</i>6<i>s</i>7<i>s</i> <sup>4</sup><i>D</i><sub>3/2</sub>–(53375 cm<sup>–1</sup>)<span>(_{{1/2}}^{^circ })</span> has been studied. The splitting is proportional to the square root of the intensity, which corresponds to the Autler–Townes effect.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"345 - 352"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213923","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
Copper-Doped Carbon Nanoparticles as a Two-Modal Nanoprobe for Luminescent and Magnetic Resonance Imaging 掺铜碳纳米粒子作为发光和磁共振成像的双模式纳米探针
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24040155
E. A. Stepanidenko, A. A. Vedernikova, S. O. Ondar, Z. F. Badrieva, E. A. Brui, M. D. Miruschenko, O. V. Volina, A. V. Koroleva, E. V. Zhizhin, E. V. Ushakova
{"title":"Copper-Doped Carbon Nanoparticles as a Two-Modal Nanoprobe for Luminescent and Magnetic Resonance Imaging","authors":"E. A. Stepanidenko,&nbsp;A. A. Vedernikova,&nbsp;S. O. Ondar,&nbsp;Z. F. Badrieva,&nbsp;E. A. Brui,&nbsp;M. D. Miruschenko,&nbsp;O. V. Volina,&nbsp;A. V. Koroleva,&nbsp;E. V. Zhizhin,&nbsp;E. V. Ushakova","doi":"10.1134/S0030400X24040155","DOIUrl":"10.1134/S0030400X24040155","url":null,"abstract":"<p>In this work, copper-doped carbon nanoparticles with emission in a wide spectral range and the ability to change the relaxation times of water protons during magnetic resonance imaging were fabricated. A high relaxivity value r1 = 0.92 mM<sup>–1</sup> s<sup>–1</sup> was achieved, which is the highest value of r1 for copper nanoparticles, to our knowledge. The suggested carbon nanoparticles are promising two-modal nanoprobes for bioimaging.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"409 - 415"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213932","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
Simulation and Measurement of Stroke in Piezoceramic Combs with a Decrease in Cross-Sectional Area of Control Elements 控制元件横截面积减小时压电陶瓷梳的冲程模拟与测量
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24040179
V. V. Toporovsky, V. V. Samarkin, A. V. Kudryashov, I. V. Galaktionov, A. A. Panich, A. Yu. Malykhin
{"title":"Simulation and Measurement of Stroke in Piezoceramic Combs with a Decrease in Cross-Sectional Area of Control Elements","authors":"V. V. Toporovsky,&nbsp;V. V. Samarkin,&nbsp;A. V. Kudryashov,&nbsp;I. V. Galaktionov,&nbsp;A. A. Panich,&nbsp;A. Yu. Malykhin","doi":"10.1134/S0030400X24040179","DOIUrl":"10.1134/S0030400X24040179","url":null,"abstract":"<p>Numerical modeling of multilayer piezoactuators with a cross-sectional area of 2 × 2 mm was carried out. It was shown that when interdigitated switching is used in piezoactuators, a local redistribution of transverse strain maxima is observed, which leads to a decrease in the mechanical strength and reliability of control elements. Piezoceramic combs with identical linear dimensions were produced and the mechanical and electrical properties of the developed elements were measured. It was revealed that stroke at a control voltage of 300 V decreases from 4 to 1.5 μm when using the interdigitated switching method in comparison with multilayer actuators of larger cross-section due to a decrease in the effective polarization area of piezoactuators. Piezoceramic combs with wire commutation were manufactured, where the displacement at a control voltage of 300 V was 4.6–4.8 μm.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"421 - 425"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213933","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
Orbital Collapse of the 5g-Electrons in the Superheavy Elements of the 8th Period 第 8 周期超重元素中 5g 电子的轨道塌缩
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24040180
I. I. Tupitsyn, I. M. Savelyev, Y. S. Kozhedub, M. Y. Kaygorodov, D. A. Glazov, N. K. Dulaev, A. V. Malyshev, V. M. Shabaev
{"title":"Orbital Collapse of the 5g-Electrons in the Superheavy Elements of the 8th Period","authors":"I. I. Tupitsyn,&nbsp;I. M. Savelyev,&nbsp;Y. S. Kozhedub,&nbsp;M. Y. Kaygorodov,&nbsp;D. A. Glazov,&nbsp;N. K. Dulaev,&nbsp;A. V. Malyshev,&nbsp;V. M. Shabaev","doi":"10.1134/S0030400X24040180","DOIUrl":"10.1134/S0030400X24040180","url":null,"abstract":"<p>The presence of the orbital collapse of the <i>g</i>-orbitals in the excited state of the atom with the nuclear charge number <i>Z</i> = 124 and in the ground state of the atom with <i>Z</i> = 125, which belong to the 8th period of the extended periodic table, is demonstrated. In both cases, the orbital collapse occurs within the same configuration when increasing the total angular momentum <i>J</i>, which characterizes the relativistic term of the atom in the <i>jj</i> coupling. All calculations are performed by means of the relativistic Dirac–Fock method.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"426 - 429"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213934","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 the Optical Properties of Aminated Carbon Dots Based on Citric Acid and Ethylenediamine 研究基于柠檬酸和乙二胺的氨基化碳点的光学特性
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24030135
I. V. Margaryan, A. M. Mitroshin, A. Yu. Dubavik, E. V. Kundelev
{"title":"Investigation of the Optical Properties of Aminated Carbon Dots Based on Citric Acid and Ethylenediamine","authors":"I. V. Margaryan,&nbsp;A. M. Mitroshin,&nbsp;A. Yu. Dubavik,&nbsp;E. V. Kundelev","doi":"10.1134/S0030400X24030135","DOIUrl":"10.1134/S0030400X24030135","url":null,"abstract":"<p>The most important parameter determining the efficiency of carbon dots as light absorbers in photocatalytic systems is the strength of their binding to the catalyst. It is rather difficult to estimate the contribution of this parameter of carbon dots to the overall efficiency of the photocatalytic system, since the post-synthetic modification of the surface of carbon dots is accompanied by a significant change in their optical and structural properties. In this work, we performed post-synthetic modification of the surface of carbon dots based on citric acid by amination with ethylenediamine molecules by activating the carboxyl groups of carbon dots with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide molecules. The use of this amination approach made it possible to change the charge of carbon dots without changing their main optical and structural properties, which can be further used to assess the contribution of the strength of their binding with Dubois-type molecular catalysts to the overall efficiency of the photocatalytic system.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 3","pages":"273 - 278"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227017","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
Monitoring of Localized Plasmon Resonance in an Inhomogeneous Ensemble of Silver Nanoparticles at the Boundary of Two Media 在两种介质边界监测银纳米粒子非均质组合中的局部等离子体共振
IF 0.8 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2024-09-11 DOI: 10.1134/S0030400X24030160
A. A. Starovoytov, A. A. Fandeev, I. Yu. Nikitin, I. A. Gladskikh, D. R. Dadadzhanov
{"title":"Monitoring of Localized Plasmon Resonance in an Inhomogeneous Ensemble of Silver Nanoparticles at the Boundary of Two Media","authors":"A. A. Starovoytov,&nbsp;A. A. Fandeev,&nbsp;I. Yu. Nikitin,&nbsp;I. A. Gladskikh,&nbsp;D. R. Dadadzhanov","doi":"10.1134/S0030400X24030160","DOIUrl":"10.1134/S0030400X24030160","url":null,"abstract":"<p>Optical properties of an inhomogeneous ensemble of plasmonic silver nanoparticles obtained by thermal vacuum deposition at the interface between two media as this interface moves relative to the nanoparticles themselves have been studied. The movement was carried out due to thermally stimulated diffusion of nanoparticles into the polystyrene layer and due to the deposition of an additional layer of quartz on a granular film with nanoparticles on a quartz substrate. The frequency shifts of the inhomogeneous plasmon resonance of nanoparticles moving through the interface was to about two tens of nanometers.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 3","pages":"290 - 295"},"PeriodicalIF":0.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227018","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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