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Transformation of Elliptical Polarization in a Layer of Absorbing Amorphous Polymer 吸波非晶态聚合物层中椭圆极化的转变
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602164
I. A. Budagovsky, A. S. Zolot’ko, M. P. Smayev, A. A. Kuznetsov, V. V. Lagunov
{"title":"Transformation of Elliptical Polarization in a Layer of Absorbing Amorphous Polymer","authors":"I. A. Budagovsky,&nbsp;A. S. Zolot’ko,&nbsp;M. P. Smayev,&nbsp;A. A. Kuznetsov,&nbsp;V. V. Lagunov","doi":"10.3103/S1068335624602164","DOIUrl":"10.3103/S1068335624602164","url":null,"abstract":"<p>The transformation of elliptical polarization in a layer of azobenzene-containing amorphous polymer is calculated. The dependences of the Stokes parameters for the propagation of a light wave deep into the layer are obtained. It is shown that the light-induced change in absorption leads to a decrease in the ellipticity of the light wave, which, in turn, slows down the rotation of the polarization ellipse. The obtained results are important for optical writing of phase structures in polymers.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"556 - 561"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108205","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
Radio Emission of the Electron Charge Excess from Extensive Air Showers Taking into Account the Geomagnetic Field in a Kinetic Model 动力学模型中考虑地磁场的大范围空气阵雨中多余电子电荷的射电发射
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601511
G. A. Gusev, Z. G. Guseva
{"title":"Radio Emission of the Electron Charge Excess from Extensive Air Showers Taking into Account the Geomagnetic Field in a Kinetic Model","authors":"G. A. Gusev,&nbsp;Z. G. Guseva","doi":"10.3103/S1068335624601511","DOIUrl":"10.3103/S1068335624601511","url":null,"abstract":"<p>The radio emission of the electron charge excess from an extensive air shower (EAS) is calculated taking into account the geomagnetic field in a kinetic model. Unlike the previous macroscopic models, the emission of each excess electron of the shower disk is calculated taking into account their longitudinal and transverse current caused by the Lorentz force. The spatial distribution of excess electrons in the disk, their energy spectrum, multiple scattering, and evolution of the disk along the EAS track is taken into account.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"503 - 507"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108201","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
Light-Trapping Structures on the Silicon Surface 硅表面的光捕获结构
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602024
E. V. Ulturgasheva, A. A. Nastulyavichus, S. I. Kudryashov
{"title":"Light-Trapping Structures on the Silicon Surface","authors":"E. V. Ulturgasheva,&nbsp;A. A. Nastulyavichus,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335624602024","DOIUrl":"10.3103/S1068335624602024","url":null,"abstract":"<p>A laser ablation method for the formation of light-trapping pyramidal microstructures on the surface of monocrystalline silicon is considered. The optimal parameters for obtaining such structures were determined, their chemical composition was investigated, and measurements of the specular reflection and transmission in the spectral range of 700–5000 cm<sup>–1</sup> were performed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"589 - 595"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108161","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
Study of the Dynamics of Dissolution and Laser Heating of Germanium Nanoparticles 锗纳米颗粒的溶解与激光加热动力学研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601535
A. A. Fronya, D. V. Donchenko, E. I. Mavreshko, I. M. Tupitsyn, M. S. Grigoryeva, I. N. Zavestovskaya
{"title":"Study of the Dynamics of Dissolution and Laser Heating of Germanium Nanoparticles","authors":"A. A. Fronya,&nbsp;D. V. Donchenko,&nbsp;E. I. Mavreshko,&nbsp;I. M. Tupitsyn,&nbsp;M. S. Grigoryeva,&nbsp;I. N. Zavestovskaya","doi":"10.3103/S1068335624601535","DOIUrl":"10.3103/S1068335624601535","url":null,"abstract":"<p>We report the results of the dissolution dynamics of germanium nanoparticles synthesized by laser ablation in distilled water and isopropanol. It is shown that germanium nanoparticles dissolve almost completely in distilled water within 24 h. A comparative experiment is performed on laser heating of distilled water and an aqueous germanium nanoparticles solution with an average nanoparticle size of ~130 nm and a concentration of 0.8 mg/ml, which makes it possible to construct heating and cooling curves. Under conditions of the experiment, the heating of the nanoparticle solution increased by 36% compared to distilled water. The obtained results can be used in photohyperthermia technologies for the treatment of cancer tumors.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"601 - 606"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108163","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
Nanosecond Fabrication of Hyperdoped Silicon 超掺杂硅的纳秒制程
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602036
A. A. Nastulyavichus, E. V. Ulturgasheva, S. I. Kudryashov
{"title":"Nanosecond Fabrication of Hyperdoped Silicon","authors":"A. A. Nastulyavichus,&nbsp;E. V. Ulturgasheva,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335624602036","DOIUrl":"10.3103/S1068335624602036","url":null,"abstract":"<p>Under the action of multipulse (≈40‒100 pulses per point) laser radiation at a wavelength of 532 nm and a pulse duration of 10 ns in an atmosphere of SF<sub>6</sub> gas, structures doped with a sulfur donor impurity are fabricated on the silicon surface. The topography of the laser-structured surface is characterized by scanning electron microscopy (SEM). Energy-dispersive X-ray microanalysis of the surface layer is indicative of the presence of up to ≈2 at % of the doping donor sulfur impurity. Fourier-IR spectroscopy shows broadband absorption for the structured samples. Using the Raman spectroscopy data, the appearance of an amorphous phase in structured silicon is demonstrated and the sizes of nanocrystallites are estimated to be ~4‒20 nm.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"583 - 588"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108210","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
Laser-Plasma High Energy Physics in Relativistic Self-Trapping of Extreme Light 极端光的相对论自俘获激光等离子体高能物理
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-01-23 DOI: 10.3103/S106833562460219X
V. Yu. Bychenkov
{"title":"Laser-Plasma High Energy Physics in Relativistic Self-Trapping of Extreme Light","authors":"V. Yu. Bychenkov","doi":"10.3103/S106833562460219X","DOIUrl":"10.3103/S106833562460219X","url":null,"abstract":"<p>Based on a presentation at the 48th Vavilov Readings (Lebedev Physical Institute of the Russian Academy of Sciences, April 17, 2024), a review is given of current issues in laser-plasma high energy physics associated with self-trapping of light pulses in relativistic plasma. An analysis is made of electron acceleration in this regime by relativistically intense laser pulses up to sub-GeV energies with multi-nanocoulomb charge carried by the accelerated electron bunch and their possible radiation/nuclear applications. The discussion of the latter includes generation of synchrotron-type secondary radiation from laser-irradiated transparent targets or converter targets in the range from hard X-rays to gamma-rays; generation of terahertz pulses, including unique half-cycle/unipolar pulses; generation of neutrons and positrons; possible deep radiography of strongly shielded objects based on laser-induced ultrabright gamma-ray bursts; an all-optical inverse Compton source for high spatial resolution radiography; and radiation FLASH therapy using laser-accelerated ultrahigh energy electrons.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 8 supplement","pages":"S617 - S652"},"PeriodicalIF":0.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108830","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
Tabletop Laser-Plasma Electron Accelerators: Experimental Designs, Acceleration Mechanisms and Some Applications 台式激光等离子体电子加速器：实验设计、加速机制和一些应用
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-01-23 DOI: 10.3103/S1068335624602218
K. A. Ivanov, I. N. Tsymbalov, D. A. Gorlova, S. A. Shulyapov, E. M. Starodubtseva, A. Yu. Zavorotnyi, A. V. Samsonov, A. I. Pavlov, R. V. Volkov, A. B. Savel’ev
{"title":"Tabletop Laser-Plasma Electron Accelerators: Experimental Designs, Acceleration Mechanisms and Some Applications","authors":"K. A. Ivanov,&nbsp;I. N. Tsymbalov,&nbsp;D. A. Gorlova,&nbsp;S. A. Shulyapov,&nbsp;E. M. Starodubtseva,&nbsp;A. Yu. Zavorotnyi,&nbsp;A. V. Samsonov,&nbsp;A. I. Pavlov,&nbsp;R. V. Volkov,&nbsp;A. B. Savel’ev","doi":"10.3103/S1068335624602218","DOIUrl":"10.3103/S1068335624602218","url":null,"abstract":"<p>We report the results of experimental and computational studies on the formation of electron beams by ultrashort terawatt laser pulses. Various acceleration regimes—direct laser acceleration (DLA), laser wake field acceleration (LWFA), and hybrid variants—are discussed. A possibility of controlling the processes occurring during such interactions with an additional nanosecond laser pulse is demonstrated: formation of a plasma with the required density and profile, change in the electron beam emission direction, and improvement of the beam emittance. Possible applications of such tabletop accelerators in the study of photonuclear processes, for the generation of unipolar pulses of extreme amplitude in the terahertz range of the spectrum, etc., are discussed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 8 supplement","pages":"S681 - S696"},"PeriodicalIF":0.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109031","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
Physics of Extremely Strong Electromagnetic Field: Status and Prospects 极强电磁场物理学：现状与展望
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-01-23 DOI: 10.3103/S1068335624602206
I. Yu. Kostyukov
{"title":"Physics of Extremely Strong Electromagnetic Field: Status and Prospects","authors":"I. Yu. Kostyukov","doi":"10.3103/S1068335624602206","DOIUrl":"10.3103/S1068335624602206","url":null,"abstract":"<p>The development of laser and accelerator technologies has made it possible to generate extremely strong electromagnetic (EM) fields with a strength several orders of magnitude higher than that of the atomic field. The review discusses the processes that play a key role in extremely strong EM fields, and new “quantum-electrodynamic” plasma states. Schemes aimed at generating extremely strong EM fields in laboratory conditions are described. These schemes can be conditionally divided into three groups: (i) all-optical schemes, (ii) laser-beam schemes, and (iii) schemes based on the interaction of charged particle beams. Much attention is paid to the XCELS project, the main objective of which is to study both fundamental processes of extremely high-intensity laser interaction with matter and possible applications associated with this interaction.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 8 supplement","pages":"S653 - S680"},"PeriodicalIF":0.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108968","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
Fabrication of Silicon Structures with Specified Fano Resonance Characteristics 具有特定范诺共振特性的硅结构的制造
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-12-26 DOI: 10.3103/S1068335624600797
N. N. Melnik, V. V. Tregulov, G. N. Skoptsova, D. S. Kostsov
{"title":"Fabrication of Silicon Structures with Specified Fano Resonance Characteristics","authors":"N. N. Melnik,&nbsp;V. V. Tregulov,&nbsp;G. N. Skoptsova,&nbsp;D. S. Kostsov","doi":"10.3103/S1068335624600797","DOIUrl":"10.3103/S1068335624600797","url":null,"abstract":"<p>We study the effect of technological parameters on the characteristics of the Fano resonance in semiconductor structures formed on silicon single-crystal substrates using thermal diffusion of boron. The Fano resonance is investigated using Raman spectroscopy. It is shown that the formation of porous silicon films on the surface of a single-crystal substrate expands the possibilities of fabricating structures with specified Fano resonance parameters, compared to samples without a porous film.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11","pages":"427 - 431"},"PeriodicalIF":0.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890491","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
Measurement of CP Violation in D0 Meson Decays at the CMS Experiment 在CMS实验中测量D0介子衰变中的CP破坏
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-12-26 DOI: 10.3103/S1068335624600682
V. S. Sergeychik, S. M. Polikarpov
{"title":"Measurement of CP Violation in D0 Meson Decays at the CMS Experiment","authors":"V. S. Sergeychik,&nbsp;S. M. Polikarpov","doi":"10.3103/S1068335624600682","DOIUrl":"10.3103/S1068335624600682","url":null,"abstract":"<p>The paper describes the search results for CP violation in the <i>D</i><sup>0</sup> → <span>(K_{S}^{0}K_{S}^{0})</span> decay. The analysis was performed using the proton–proton collision data with centre-of-mass energy of <span>(sqrt s )</span> = 13 TeV, recorded by the CMS experiment at the Large Hadron Collider. The analyzed data sample contains about 10<sup>10</sup> events associated with production of charm hadrons, which allows performing precise measurements. The measured CP violation parameter is <i>A</i><sub>CP</sub> (<i>D</i><sup>0</sup> → <span>(K_{S}^{0}K_{S}^{0})</span>) = (6.2 ± 3.1 (stat.) ± 0.2 (syst.) ± 0.8 (<i>A</i><sub>CP</sub> (<i>D</i><sup>0</sup> → <span>(K_{S}^{0})</span>π<sup>+</sup>π<sup>−</sup>))%, where the last uncertainty is due to the uncertainty in the reference channel asymmetry <i>A</i><sub>CP</sub> (<i>D</i><sup>0</sup> → <span>(K_{S}^{0})</span>π<sup>+</sup>π<sup>−</sup>). The obtained results are consistent with no CP violation in the studied decay. This analysis is the first measurement of CP violation in charm sector at the CMS experiment.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11","pages":"439 - 444"},"PeriodicalIF":0.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.3103/S1068335624600682.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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