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Bulletin of the Russian Academy of Sciences: Physics最新文献

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Model of Orthogonal Two-Wave Mixing in Optically Active Photorefractive Crystal of Cubic Symmetry
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-02-10 DOI: 10.1134/S1062873824710663
M. N. Bezruk, T. A. Efimov, D. V. Storozhenko, R. V. Romashko
{"title":"Model of Orthogonal Two-Wave Mixing in Optically Active Photorefractive Crystal of Cubic Symmetry","authors":"M. N. Bezruk,&nbsp;T. A. Efimov,&nbsp;D. V. Storozhenko,&nbsp;R. V. Romashko","doi":"10.1134/S1062873824710663","DOIUrl":"10.1134/S1062873824710663","url":null,"abstract":"<p>We presented a complete physical model describing the process of two-wave vectorial mixing in optically active photorefractive crystals of cubic symmetry for an orthogonal interferometer scheme. Using the model, we calculated the two-wave interaction in a gyrotropic photorefractive crystal of bismuth titanate B<sub>12</sub>TiO<sub>20</sub> at two wavelengths of 633 and 532 nm. Studies using the complete model showed that the full polarization independence mode is not achieved. It was found that it is possible to select the parameters of the crystal and interacting waves for the quasi-polarization independence mode, when signal changes caused by polarization instability of the signal wave are reduced to a minimum (no more than 6%). Based on the obtained results, it is recommended to choose a PRC with a high optical activity value for the implementation of polarization-independent interferometric schemes.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 4 supplement","pages":"S664 - S669"},"PeriodicalIF":0.48,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638585","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
Low-Temperature Spectroscopy of Single CVD Microdiamonds with GeV Color Centers
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-02-10 DOI: 10.1134/S1062873824710651
M. I. Pavlenko, A. Yu. Neliubov, I. Yu. Eremchev, V. S. Sedov, I. A. Tiazhelov, A. K. Martyanov
{"title":"Low-Temperature Spectroscopy of Single CVD Microdiamonds with GeV Color Centers","authors":"M. I. Pavlenko,&nbsp;A. Yu. Neliubov,&nbsp;I. Yu. Eremchev,&nbsp;V. S. Sedov,&nbsp;I. A. Tiazhelov,&nbsp;A. K. Martyanov","doi":"10.1134/S1062873824710651","DOIUrl":"10.1134/S1062873824710651","url":null,"abstract":"<p>We presented the results of low-temperature photoluminescence (PL) spectra investigations of diamond microcrystals with germanium-vacancy GeV color centers. The microdiamonds were synthesized by plasma chemical vapor deposition (CVD) using gaseous germanium as an impurity source. The PL spectra of single microdiamonds at 8 K contain either a single or a few narrow lines spreading between 600 and 606 nm instead of zero-phonon line quartet characteristic for GeV-centers. The observed 100% polarization contrast of individual spectral line is indirect evidence that the corresponding emission originates from single GeV-center. The deviations of the obtained PL peak positions from the expected ones are explained by the lattice stresses, introduced during the synthesis of microcrystals. The widths of the observed spectral lines appear to be significantly smaller than the characteristic values obtained for ensembles of GeV-centers earlier.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 4 supplement","pages":"S658 - S663"},"PeriodicalIF":0.48,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638584","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 Approach of Laser-Induced Spherical Microcavitation Bubbles: Effect of Enthalpy
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-20 DOI: 10.1134/S106287382470970X
Ali F. Abu-Bakr, Ahmed K. Abu-Nab, Zain AbuShaeer
{"title":"Numerical Approach of Laser-Induced Spherical Microcavitation Bubbles: Effect of Enthalpy","authors":"Ali F. Abu-Bakr,&nbsp;Ahmed K. Abu-Nab,&nbsp;Zain AbuShaeer","doi":"10.1134/S106287382470970X","DOIUrl":"10.1134/S106287382470970X","url":null,"abstract":"<p>Over the past decades, interest has increased in studying different techniques to detect the importance of microbubbles in many industrial and medical applications such as mechanisms of hydraulic machinery cavitation erosion, histotripsy, and lithotripsy. The behavior from early irregular oscillations to late regular oscillations of spherical microcavitation bubbles produced by lasers in water was studied by means of plasma photography. Repetition of such delayed oscillations results in quantities of gas/vapour inside the spherical bubbles. Using the modified Gilmore model of cavitation microbubble dynamics, calculations were made for the laser pulse energy, microbubble radius behavior, and microbubble growth rate. Additionally, the pressure evolution inside the bubble, and pressures distribution surrounding of microbubbles in liquid are investigated under the effect of different values of initial cavitation of microbubble radius. The effect of enthalpy is considered into account. The proposed model is solved numerically using numerical techniques as a finite difference method. In addition, the radius of the microbubbles is calculated as a function of time under the influence of the initial radius of these laser-induced microcavitations. Moreover, some physical properties and numerical calculations of the presented mathematical model for cavitation induced by lasers bubbles are deduced, analyzed and investigated.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S287 - S292"},"PeriodicalIF":0.48,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496739","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 Study of Light Guiding Nanostructures Based on Non-van-der-Waals InGaS3
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-20 DOI: 10.1134/S1062873824709851
A. Kuznetsov, E. S. Zavyalova, M. A. Anikina, A. D. Bolshakov
{"title":"Numerical Study of Light Guiding Nanostructures Based on Non-van-der-Waals InGaS3","authors":"A. Kuznetsov,&nbsp;E. S. Zavyalova,&nbsp;M. A. Anikina,&nbsp;A. D. Bolshakov","doi":"10.1134/S1062873824709851","DOIUrl":"10.1134/S1062873824709851","url":null,"abstract":"<p>For the development of integrated optical circuits novel approaches aimed at miniaturization of the solutions are needed. For this, materials possessing high optical density and allowing feasible fabrication are demanded. Among the promising materials InGaS<sub>3</sub> demonsrating optical anisotropy and high refractive index is one of the interesting platforms. In this work we investigate the effects of InGaS<sub>3</sub> strip and slot waveguides geometry on their optical properties. We use numerical simulations to investigate square, rectangle and slot waveguides and evaluate the influence of their longitudinal and lateral size on eigenmodes field distribution, optical losses and transmittance spectra. For strip waveguides we obtain the design of square, rectangle TE and TM cross-section geometry below the waveguiding cut-off (∼70–100 nm), single- (∼120–250 nm) and multimode regime (&gt;250 nm). For the slot waveguides the gap modes were calculated for 505 nm wavelength varying gap values. Transmittance spectra demonstrate dependence on the gap size which allows to develop the bandpass or long-pass optical filters. The obtained results open pathways for fabrication of promising photonic devices based on InGaS<sub>3</sub> thin layers.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S375 - S379"},"PeriodicalIF":0.48,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496743","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
Towards High Precision Laser Nanostructuring of CsPbBr3 Perovskite with UV Femtosecond Laser Pulses
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-20 DOI: 10.1134/S1062873824709735
A. B. Cherepakhin, A. A. Kuchmizhak, S. V. Makarov, A. Yu. Zhizhchenko
{"title":"Towards High Precision Laser Nanostructuring of CsPbBr3 Perovskite with UV Femtosecond Laser Pulses","authors":"A. B. Cherepakhin,&nbsp;A. A. Kuchmizhak,&nbsp;S. V. Makarov,&nbsp;A. Yu. Zhizhchenko","doi":"10.1134/S1062873824709735","DOIUrl":"10.1134/S1062873824709735","url":null,"abstract":"<p>Laser patterning technologies for halide perovskite materials have recently shown significant progress due to their optimal combination of cost, performance and resolution. Nevertheless, due to the relative novelty of the material, some aspects of laser structuring of perovskites have not yet been studied. Some of the most important parameters of the fabrication method is the roughness of the treated surface and the number of structural defects that negatively affect the characteristics of manufactured devices. This paper presents for the first time the results of laser structuring of CsPbBr<sub>3</sub> perovskite microcrystals using ultraviolet femtosecond radiation with a wavelength of 257 nm. The possibility of creating structures on the surface of single microcrystals with submicrometer resolution without visible deterioration of the photoluminescent properties of the material, despite the high photosensitivity of the material to this wavelength range, is shown. The created structures have an extremely low roughness comparable to the roughness of the initial surface of monocrystals, which is unusual for direct laser ablation processing methods and has great potential for fabrication of perovskite nanophotonics elements.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S303 - S308"},"PeriodicalIF":0.48,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496738","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
Direct Laser Metallization from Deep Eutectic Solvents on Polymer Substrates
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-20 DOI: 10.1134/S1062873824709887
A. Shmalko, A. Zakharov, E. Khairullina, I. Tumkin, D. Shestakov, A. Komlev, E. Danilovskiy, A. Manshina, L. Logunov
{"title":"Direct Laser Metallization from Deep Eutectic Solvents on Polymer Substrates","authors":"A. Shmalko,&nbsp;A. Zakharov,&nbsp;E. Khairullina,&nbsp;I. Tumkin,&nbsp;D. Shestakov,&nbsp;A. Komlev,&nbsp;E. Danilovskiy,&nbsp;A. Manshina,&nbsp;L. Logunov","doi":"10.1134/S1062873824709887","DOIUrl":"10.1134/S1062873824709887","url":null,"abstract":"<p>The task of local metallization of polymer substrates such as PDMS (polydimethylsiloxane) is a challenging and important task for the development of biocompatible flexible electronics. Here we present for the first time the possibility of using the Direct laser metallization (DLM) method for fabrication of copper conducting structures on PDMS. It has been shown that DLM method allows one to obtain conductive structures with low resistivity and a developed surface with minimal thermal impact on the substrate. By optimizing the scanning speed and laser power density, it was possible to minimize the thermal degradation of PDMS and ensure reliable metal adhesion. The DLM method opens up new opportunities for creating flexible electronics, providing precise and cost-effective deposition of copper conductors on flexible substrates.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S385 - S389"},"PeriodicalIF":0.48,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496742","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
Optical Properties of Biaxial van der Waals Crystals for Photonic Applications
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-20 DOI: 10.1134/S1062873824709978
A. Slavich, G. Ermolaev, I. Zavidovskiy, D. Grudinin, M. Tatmyshevskiy, A. Toksumakov, A. Syuy, A. Vyshnevyy, D. Yakubovsky, S. Novikov, D. Ghazaryan, A. Arsenin, V. Volkov
{"title":"Optical Properties of Biaxial van der Waals Crystals for Photonic Applications","authors":"A. Slavich,&nbsp;G. Ermolaev,&nbsp;I. Zavidovskiy,&nbsp;D. Grudinin,&nbsp;M. Tatmyshevskiy,&nbsp;A. Toksumakov,&nbsp;A. Syuy,&nbsp;A. Vyshnevyy,&nbsp;D. Yakubovsky,&nbsp;S. Novikov,&nbsp;D. Ghazaryan,&nbsp;A. Arsenin,&nbsp;V. Volkov","doi":"10.1134/S1062873824709978","DOIUrl":"10.1134/S1062873824709978","url":null,"abstract":"<p>Recent advancements in nanophotonic devices rely on materials with high refractive index and large optical anisotropy. Among them, van der Waals (vdW) crystals have garnered considerable interest due to their record-value optical properties originating from their complex layered structure. Moreover, the number of vdW crystals increases rapidly every year, but their traditional optical characterization is time-consuming and cannot keep up with vdW crystals’ appearance. Here, we introduce an express method for the determination of vdW optical properties to resolve this issue by taking into account their anisotropy. Our approach relies on polarized micro-transmittance, which allows us to demonstrate the superior optical response of vdW crystals on the example of hBN and GeS<sub>2</sub>. Hence, our developed technique offers a universal tool for the characterization of vdW materials’ optical properties for current and next-generation vdW-based photonic devices.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S433 - S438"},"PeriodicalIF":0.48,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496737","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
Magnetoelectric Effects in Synthetic Multiferroic Structures for Spintronic Applications 自旋电子合成多铁结构中的磁电效应
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708754
Z. V. Gareeva, A. M. Trochina, T. Gareev, A. K. Zvezdin
{"title":"Magnetoelectric Effects in Synthetic Multiferroic Structures for Spintronic Applications","authors":"Z. V. Gareeva,&nbsp;A. M. Trochina,&nbsp;T. Gareev,&nbsp;A. K. Zvezdin","doi":"10.1134/S1062873824708754","DOIUrl":"10.1134/S1062873824708754","url":null,"abstract":"<p>We studied the magnetoelectric effects in synthetic multiferroic structures, which are of significant interest for spintronic applications. Using advanced micromagnetic simulation techniques, we investigated magnetoelectric effects in several key synthetic structures, including ferromagnetic–multiferroic (with a uniform magnetic state) film, ferromagnetic-multiferroic structure with a spin cycloid as the ground state, and exchange-coupled ferromagnetic film characterized by non-uniform magnetoelectric effects. Our results reveal the diverse micromagnetic states achievable within these systems and highlight their corresponding magnetoelectric properties. The influence of non-collinear magnetic phases, which occur in noncentrosymmetric multiferroic and ferromagnetic structures, on the magnetization reversal processes of exchange-coupled films has been explored. The findings underscore the versatility of micromagnetic simulations in studying complex multiferroic structures, providing valuable insights for the design of next-generation spintronic devices.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 1 supplement","pages":"S36 - S41"},"PeriodicalIF":0.48,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995013","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
Phase Transitions in the Weakly Diluted 4-State Potts Model on a Triangular Lattice 三角形晶格上弱稀释4态波模型的相变
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708699
A.B. Babaev, A.K. Murtazaev
{"title":"Phase Transitions in the Weakly Diluted 4-State Potts Model on a Triangular Lattice","authors":"A.B. Babaev,&nbsp;A.K. Murtazaev","doi":"10.1134/S1062873824708699","DOIUrl":"10.1134/S1062873824708699","url":null,"abstract":"<p>We report a numerical study of the weakly diluted 4-state Potts model on a triangular lattice using Monte Carlo method. We consider systems with linear dimensions <i>L × L = N</i>, <i>L</i> = 10–160. Phase transitions in the Potts model are investigated employing the fourth-order Binder cumulants method and the histogram data analysis. Second-order phase transitions which are close to weakly first-order transitions are shown to occur in the 4-state Potts model on a triangular lattice. The addition of a nonmagnetic disorder has a stabilizing role in the realization of second-order phase transitions.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 1 supplement","pages":"S1 - S4"},"PeriodicalIF":0.48,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994856","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
Magnetization of Solid Solutions of Antiferromagnets Ni3 – xCoxB2O6 with the Competing Orientation of Anisotropy Axes 各向异性轴竞争取向下反铁磁体Ni3 - xCoxB2O6固溶体的磁化
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708778
S. N. Sofronova, D. A. Velikanov, E. M. Moshkina, A. V. Chernyshev
{"title":"Magnetization of Solid Solutions of Antiferromagnets Ni3 – xCoxB2O6 with the Competing Orientation of Anisotropy Axes","authors":"S. N. Sofronova,&nbsp;D. A. Velikanov,&nbsp;E. M. Moshkina,&nbsp;A. V. Chernyshev","doi":"10.1134/S1062873824708778","DOIUrl":"10.1134/S1062873824708778","url":null,"abstract":"<p>We studied the magnetic properties of Ni<sub>3 –</sub> <sub><i>x</i></sub>Co<sub><i>x</i></sub>B<sub>2</sub>O<sub>6</sub> solid solutions with the kotoite structure, where <i>x</i> = 0; 0.19; 0.6; 0.93; 2. The compounds Ni<sub>3</sub>B<sub>2</sub>O<sub>6</sub> and Co<sub>3</sub>B<sub>2</sub>O<sub>6</sub> are antiferromagnets, with their easy axis of magnetization coinciding with the crystallographic directions <i>c</i> and <i>b</i>, respectively. In the Ni<sub>2.81</sub>Co<sub>0.19</sub>B<sub>2</sub>O<sub>6</sub> solid solution, two features are found on magnetization curves, while in other solid solutions there is only one feature. With the cobalt ion concentration <i>x</i> &gt; 0.9, the magnetic moments are predominantly oriented along the <i>b</i> axis.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 1 supplement","pages":"S47 - S52"},"PeriodicalIF":0.48,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995018","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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