Pub Date : 2024-03-14DOI: 10.1134/s0030400x23040185
V. A. Shutaev, E. A. Grebenshchikova, V. A. Matveev, N. N. Gubanova, Yu. P. Yakovlev
Abstract
The kinetics of changing in optical transmittance of palladium (Pd) nanolayers (about 10 nm thick, deposited on object glass substrates by thermal evaporation in vacuum) in hydrogen flow (100% H2) in the temperature range of 300–335 K are studied. It is shown that the rate of changing of palladium optical transmittance at hydrogen flow rises linearly with increasing the temperature due to sorption of hydrogen by Pd layer. The rate of changing in optical transmittance of Pd layer during sorption and desorption of hydrogen is established to rise by about one order with increasing the temperature from 300 to 335 K. The curves describing the changing in optical transmittance of palladium nanolayer during hydrogen desorption have two distinct sections: linear and nonlinear. The linear section of the curve weakly depends on temperature, while the nonlinear section sharply rises with increasing the temperature. Such the changing of the rate in optical transmittance can be associated with phase transition from β- to α-phase during hydrogen desorption from palladium.
摘要 研究了在 300-335 K 温度范围内氢流（100% H2）中钯（Pd）纳米层（厚约 10 nm，在真空中通过热蒸发沉积在物体玻璃基片上）透光率变化的动力学。结果表明，由于钯层吸附了氢气，氢气流动时钯的透光率变化率随温度的升高呈线性上升。在吸附和解吸氢气的过程中，钯层的透光率变化率随着温度从 300 K 升至 335 K 而上升约一个数量级。描述纳米钯层在氢气解吸过程中透光率变化的曲线有两个不同的部分：线性和非线性。曲线的线性部分与温度关系不大，而非线性部分则随着温度的升高而急剧上升。这种光学透射率的变化可能与钯在氢解吸过程中从β相到α相的相变有关。
{"title":"Kinetics of Changing in Optical Transmittance of Palladium Nanolayers during Interaction with Hydrogen","authors":"V. A. Shutaev, E. A. Grebenshchikova, V. A. Matveev, N. N. Gubanova, Yu. P. Yakovlev","doi":"10.1134/s0030400x23040185","DOIUrl":"https://doi.org/10.1134/s0030400x23040185","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The kinetics of changing in optical transmittance of palladium (Pd) nanolayers (about 10 nm thick, deposited on object glass substrates by thermal evaporation in vacuum) in hydrogen flow (100% H<sub>2</sub>) in the temperature range of 300–335 K are studied. It is shown that the rate of changing of palladium optical transmittance at hydrogen flow rises linearly with increasing the temperature due to sorption of hydrogen by Pd layer. The rate of changing in optical transmittance of Pd layer during sorption and desorption of hydrogen is established to rise by about one order with increasing the temperature from 300 to 335 K. The curves describing the changing in optical transmittance of palladium nanolayer during hydrogen desorption have two distinct sections: linear and nonlinear. The linear section of the curve weakly depends on temperature, while the nonlinear section sharply rises with increasing the temperature. Such the changing of the rate in optical transmittance can be associated with phase transition from β- to α-phase during hydrogen desorption from palladium.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148411","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23030128
I. A. Maltsev, D. A. Tumakov, R. V. Popov, V. M. Shabaev
Abstract
The relativistic calculations of energies and widths are performed for the lowest states of hydrogen and hydrogenlike neon. The calculations are carried out using the finite-basis technique combined with the complex-scaling method. The obtained results are compared with the available nonrelativistic and relativistic data.
{"title":"Calculations of Relativistic Stark Energies and Widths in Hydrogen-Like Ions Using the Complex-Scaling Method","authors":"I. A. Maltsev, D. A. Tumakov, R. V. Popov, V. M. Shabaev","doi":"10.1134/s0030400x23030128","DOIUrl":"https://doi.org/10.1134/s0030400x23030128","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The relativistic calculations of energies and widths are performed for the lowest states of hydrogen and hydrogenlike neon. The calculations are carried out using the finite-basis technique combined with the complex-scaling method. The obtained results are compared with the available nonrelativistic and relativistic data.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148217","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x2304001x
A. A. Andreev, L. A. Litvinov, K. Yu. Platonov
Abstract
The amplification in a free-electron laser undulator of a short-wavelength subattosecond pulse formed in a laser plasma upon its interaction with a relativistic electron bunch produced by a petawatt laser is considered. The aim of this work is to find the parameters of the system at which it is possible to amplify ultrashort pulses with a duration of up to hundreds of zeptoseconds.
{"title":"Amplification of Short-Wavelength Subattopulses in a Free-Electron Laser Using Electrons Accelerated in a Laser Plasma","authors":"A. A. Andreev, L. A. Litvinov, K. Yu. Platonov","doi":"10.1134/s0030400x2304001x","DOIUrl":"https://doi.org/10.1134/s0030400x2304001x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The amplification in a free-electron laser undulator of a short-wavelength subattosecond pulse formed in a laser plasma upon its interaction with a relativistic electron bunch produced by a petawatt laser is considered. The aim of this work is to find the parameters of the system at which it is possible to amplify ultrashort pulses with a duration of up to hundreds of zeptoseconds.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148345","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23040112
V. A. Kartoshkin
Abstract
The calculation of the frequency shifts of the magnetic resonance of K and Li atoms in a K–Li mixture has been carried out. A significant difference in the behavior of the temperature dependences of the frequency shifts for the optical orientation of K or Li atoms is established.
摘要 对 K-Li 混合物中 K 原子和 Li 原子的磁共振频移进行了计算。结果表明，K 原子或 Li 原子光学取向的频率偏移随温度变化的行为存在明显差异。
{"title":"Magnetic Resonance Frequency Shifts of Alkali Atoms in a K–Li Mixture","authors":"V. A. Kartoshkin","doi":"10.1134/s0030400x23040112","DOIUrl":"https://doi.org/10.1134/s0030400x23040112","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The calculation of the frequency shifts of the magnetic resonance of K and Li atoms in a K–Li mixture has been carried out. A significant difference in the behavior of the temperature dependences of the frequency shifts for the optical orientation of K or Li atoms is established.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140127898","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23030141
N. N. Rosanov
Abstract
Polarization singularities arising from the interference of three plane monochromatic waves with close propagation directions in a vacuum or a linear isotropic medium are studied within the framework of the quasi-optical approximation. With a special choice of linear polarization of waves, the conditions for the formation of L-lines in the cross section, where the polarization is linear, and C-points, where the polarization is circular, are determined, and analytical expressions are obtained for the location of such polarization singularities.
摘要 在准光学近似的框架内研究了在真空或线性各向同性介质中传播方向相近的三个平面单色波干涉产生的极化奇异现象。在波的线性偏振的特殊选择下，确定了偏振为线性时在横截面上形成 L 线和偏振为圆形时形成 C 点的条件，并得到了这种偏振奇点位置的解析表达式。
{"title":"Polarization Singularities in the Interference of Three Plane Waves","authors":"N. N. Rosanov","doi":"10.1134/s0030400x23030141","DOIUrl":"https://doi.org/10.1134/s0030400x23030141","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Polarization singularities arising from the interference of three plane monochromatic waves with close propagation directions in a vacuum or a linear isotropic medium are studied within the framework of the quasi-optical approximation. With a special choice of linear polarization of waves, the conditions for the formation of L-lines in the cross section, where the polarization is linear, and C-points, where the polarization is circular, are determined, and analytical expressions are obtained for the location of such polarization singularities.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140124939","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23040033
R. M. Arkhipov, M. V. Arkhipov, A. V. Pakhomov, O. O. Dyachkova, N. N. Rosanov
Abstract
In the case of coherent interaction with a medium of extremely short light pulses (ESPs) having a carrier frequency and harmonic shape (when the pulse durations are shorter than the population relaxation times T1 and polarization relaxation time T2 of the medium), electromagnetically induced gratings (EMIGs) of the population difference, which have a pronounced harmonic dependence on the coordinates, may appear in it. These structures can occur when pulses do not overlap or overlap in the medium. Recently, the possibility of obtaining unipolar electromagnetic pulses in the optical and adjacent ranges of non-harmonic shape, for example, rectangular and triangular, with a duration less or comparable to the duration of the extremely-short pulse in this range, has attracted interest. In this work, using the numerical solution of the system of Maxwell–Bloch equations, we study EMIG formation by rectangular attosecond pulses in a two-level resonant medium. The possibility of inducing an EMIG of a non-harmonic shape in the form of light-induced channels microresonators (microcavities) with a size of the order of the wavelength of the resonant transition of the medium, whose parameters can be controlled, for example, by the amplitude of the incident pulses, is shown. It has been suggested that it is possible to create an EMIG of a predetermined non-harmonic shape only in the general case of using unipolar pulses.
{"title":"Nonharmonic Spatial Population Difference Structures Created by Unipolar Rectangular Pulses in a Resonant Medium","authors":"R. M. Arkhipov, M. V. Arkhipov, A. V. Pakhomov, O. O. Dyachkova, N. N. Rosanov","doi":"10.1134/s0030400x23040033","DOIUrl":"https://doi.org/10.1134/s0030400x23040033","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the case of coherent interaction with a medium of extremely short light pulses (ESPs) having a carrier frequency and harmonic shape (when the pulse durations are shorter than the population relaxation times <i>T</i><sub>1</sub> and polarization relaxation time <i>T</i><sub>2</sub> of the medium), electromagnetically induced gratings (EMIGs) of the population difference, which have a pronounced harmonic dependence on the coordinates, may appear in it. These structures can occur when pulses do not overlap or overlap in the medium. Recently, the possibility of obtaining unipolar electromagnetic pulses in the optical and adjacent ranges of non-harmonic shape, for example, rectangular and triangular, with a duration less or comparable to the duration of the extremely-short pulse in this range, has attracted interest. In this work, using the numerical solution of the system of Maxwell–Bloch equations, we study EMIG formation by rectangular attosecond pulses in a two-level resonant medium. The possibility of inducing an EMIG of a non-harmonic shape in the form of light-induced channels microresonators (microcavities) with a size of the order of the wavelength of the resonant transition of the medium, whose parameters can be controlled, for example, by the amplitude of the incident pulses, is shown. It has been suggested that it is possible to create an EMIG of a predetermined non-harmonic shape only in the general case of using unipolar pulses.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140127914","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x2304015x
B. V. Petrov, M. P. Volkov
Abstract
Reflection spectra of quasi-two-dimensional organic conductors (EDT–TTF)4[Hg3I8]1–x, are considered, which, depending on the composition, demonstrate different phase transitions: x = 0.027—metal–superconductor with Tc = 8.1 K, x = 0—metal–insulator at a temperature of T < 35 K. The polarized reflection spectra were analyzed using the “phase phonons” model, which takes into account the electronic-vibrational interaction. Using this model, the optical functions of both compounds were adequately described and the energy parameters of the π-electron system were obtained. It is shown that for the compound with x = 0.027 these parameters change monotonically with temperature, while for x = 0 they show a jump at the phase transition temperature. A comparison of the model parameter Δ (the value of the periodic potential) for crystals with different stoichiometric coefficients x = 0 and 0.027 was carried out and an assumption was made about the dependence of the periodic potential on the average charge of one EDT molecule.
摘要 研究了准二维有机导体（EDT-TTF）4[Hg3I8]1-x 的反射光谱，根据组成的不同，它们表现出不同的相变：x = 0.027-金属-超导体，Tc = 8.1 K；x = 0-金属-绝缘体，温度为 T < 35 K。偏振反射光谱采用 "相声子 "模型进行分析，该模型考虑了电子-振动相互作用。利用该模型，两种化合物的光学函数都得到了充分的描述，并获得了 π 电子系统的能量参数。结果表明，对于 x = 0.027 的化合物，这些参数随温度的变化呈单调变化，而对于 x = 0 的化合物，这些参数在相变温度时会出现跃变。对具有不同化学计量系数 x = 0 和 0.027 的晶体的模型参数 Δ（周期电势值）进行了比较，并假设周期电势取决于一个 EDT 分子的平均电荷。
{"title":"Optical Studies of Quasi-Two-Dimensional Organic Metals (EDT–TTF)4[Hg3I8]1–x (x = 0 and 0.027)—Comparative Analysis within the Phase Phononsmodel","authors":"B. V. Petrov, M. P. Volkov","doi":"10.1134/s0030400x2304015x","DOIUrl":"https://doi.org/10.1134/s0030400x2304015x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Reflection spectra of quasi-two-dimensional organic conductors (EDT–TTF)<sub>4</sub>[Hg<sub>3</sub>I<sub>8</sub>]<sub>1–<i>x</i></sub>, are considered, which, depending on the composition, demonstrate different phase transitions: <i>x</i> = 0.027—metal–superconductor with <i>T</i><sub><i>c</i></sub> = 8.1 K, <i>x</i> = 0—metal–insulator at a temperature of <i>T <</i> 35 K. The polarized reflection spectra were analyzed using the “phase phonons” model, which takes into account the electronic-vibrational interaction. Using this model, the optical functions of both compounds were adequately described and the energy parameters of the π-electron system were obtained. It is shown that for the compound with <i>x</i> = 0.027 these parameters change monotonically with temperature, while for <i>x</i> = 0 they show a jump at the phase transition temperature. A comparison of the model parameter Δ (the value of the periodic potential) for crystals with different stoichiometric coefficients <i>x</i> = 0 and 0.027 was carried out and an assumption was made about the dependence of the periodic potential on the average charge of one EDT molecule.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125313","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23040021
A. A. Andreev, L. A. Litvinov
Abstract
Diffraction gratings and photonic crystals are widely used to control light. However, their capabilities are less effective in the case of extreme ultraviolet (XUV) radiation due to the high absorption of the optical material in this frequency range. In this work, we study the possibility of enhancing the angular dispersion of XUV radiation due to scattering by plasma clusters whose dimensions are smaller than the incident radiation wavelength. An analytical model was developed using the plasma Drude dielectric function and the Mie scattering theory in the quasi-static approximation. The resonant parameters of the target for the tenth harmonic of the Ti:Sa-laser are determined, and a significant enhancement of the scattered field in this case compared to the laser one is shown. Under resonance conditions for one cluster, the diffraction of radiation by an array of such clusters is simulated using the CELES code. The results obtained show a significant enhancement of the scattered field in the resonance case for large angles corresponding to the theory of Bragg–Wulf diffraction, which makes it possible to control high harmonics of laser radiation in the XUV range using ionized cluster gas.
{"title":"Angular Dispersion Boost of High Order Laser Harmonics Interacting with Dense Plasma Clusters","authors":"A. A. Andreev, L. A. Litvinov","doi":"10.1134/s0030400x23040021","DOIUrl":"https://doi.org/10.1134/s0030400x23040021","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Diffraction gratings and photonic crystals are widely used to control light. However, their capabilities are less effective in the case of extreme ultraviolet (XUV) radiation due to the high absorption of the optical material in this frequency range. In this work, we study the possibility of enhancing the angular dispersion of XUV radiation due to scattering by plasma clusters whose dimensions are smaller than the incident radiation wavelength. An analytical model was developed using the plasma Drude dielectric function and the Mie scattering theory in the quasi-static approximation. The resonant parameters of the target for the tenth harmonic of the Ti:Sa-laser are determined, and a significant enhancement of the scattered field in this case compared to the laser one is shown. Under resonance conditions for one cluster, the diffraction of radiation by an array of such clusters is simulated using the CELES code. The results obtained show a significant enhancement of the scattered field in the resonance case for large angles corresponding to the theory of Bragg–Wulf diffraction, which makes it possible to control high harmonics of laser radiation in the XUV range using ionized cluster gas.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148377","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23030165
A. A. Shakirova, G. A. Gusev, E. V. Dementeva, A. A. Averin, T. B. Popova, M. V. Zamoryanskaya
Abstract
In this work, stabilized f-ZrO2 ceramic samples with the compositions of (Zr0.82Y0.09Eu0.09)O1.91, (Zr0.82Y0.09Tb0.09)O1.91 and (Zr0.82Y0.09Eu0.045Tb0.045)O1.91 were studied. The elemental composition was studied by electron probe microanalysis, and the luminescent properties were studied by local cathodoluminescence (CL). An analysis of the Eu3+ CL spectra confirmed the stabilization of the cubic phase in ceramics at room temperature. The study of the obtained CL spectra, the 5D4–7F5Tb3+ band luminescence decay kinetics, CL images and excitation spectra showed europium sensitization by terbium in (Zr0.82Y0.09Eu0.045Tb0.045)O1.91.
{"title":"Sensitization of Europium (Eu3+) Ions by Terbium (Tb3+) in Ceramics Based on Yttrium Stabilized Cubic Zirconium Dioxide","authors":"A. A. Shakirova, G. A. Gusev, E. V. Dementeva, A. A. Averin, T. B. Popova, M. V. Zamoryanskaya","doi":"10.1134/s0030400x23030165","DOIUrl":"https://doi.org/10.1134/s0030400x23030165","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this work, stabilized <i>f</i>-ZrO<sub>2</sub> ceramic samples with the compositions of (Zr<sub>0.82</sub>Y<sub>0.09</sub>Eu<sub>0.09</sub>)O<sub>1.91</sub>, (Zr<sub>0.82</sub>Y<sub>0.09</sub>Tb<sub>0.09</sub>)O<sub>1.91</sub> and (Zr<sub>0.82</sub>Y<sub>0.09</sub>Eu<sub>0.045</sub>Tb<sub>0.045</sub>)O<sub>1.91</sub> were studied. The elemental composition was studied by electron probe microanalysis, and the luminescent properties were studied by local cathodoluminescence (CL). An analysis of the Eu<sup>3+</sup> CL spectra confirmed the stabilization of the cubic phase in ceramics at room temperature. The study of the obtained CL spectra, the <sup>5</sup><i>D</i><sub>4</sub>–<sup>7</sup><i>F</i><sub>5</sub>Tb<sup>3+</sup> band luminescence decay kinetics, CL images and excitation spectra showed europium sensitization by terbium in (Zr<sub>0.82</sub>Y<sub>0.09</sub>Eu<sub>0.045</sub>Tb<sub>0.045</sub>)O<sub>1.91</sub>.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148406","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}
Pub Date : 2024-03-14DOI: 10.1134/s0030400x23040148
V. Yu. Osipov, K. V. Bogdanov, A. Rampersaud, K. Takai, Y. Ishiguro, A. V. Baranov
Abstract
Electron paramagnetic resonance (EPR) spectra of synthetic diamond microcrystals with NV(‒)‑centers have been studied. It is shown that under the conditions of irradiation of the material with the light of a xenon lamp at low temperatures ~100 K, the intensities of the EPR signals corresponding to the “forbidden” (Δms = 2) and low field allowed (Δms = 1) transitions are amplified several times, while the EPR signals from paramagnetic nitrogen and impurity nickel in the charge state –1 practically do not change. This is due to a change in the population of levels of the ground triplet state of the NV(–)-center and the optical polarization of spins in the state ms = 0 of the triplet level.
{"title":"Electron Spin Resonance of NV(–)-Centers in Synthetic Fluorescent Diamond Microcrystals under Conditions of Optical Spin Polarization","authors":"V. Yu. Osipov, K. V. Bogdanov, A. Rampersaud, K. Takai, Y. Ishiguro, A. V. Baranov","doi":"10.1134/s0030400x23040148","DOIUrl":"https://doi.org/10.1134/s0030400x23040148","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Electron paramagnetic resonance (EPR) spectra of synthetic diamond microcrystals with NV<sup>(‒)</sup>‑centers have been studied. It is shown that under the conditions of irradiation of the material with the light of a xenon lamp at low temperatures ~100 K, the intensities of the EPR signals corresponding to the “forbidden” (Δ<i>m</i><sub><i>s</i></sub> = 2) and low field allowed (Δ<i>m</i><sub><i>s</i></sub> = 1) transitions are amplified several times, while the EPR signals from paramagnetic nitrogen and impurity nickel in the charge state –1 practically do not change. This is due to a change in the population of levels of the ground triplet state of the NV<sup>(–)</sup>-center and the optical polarization of spins in the state <i>m</i><sub><i>s</i></sub> = 0 of the triplet level.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125186","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}
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