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Bulletin of the Lebedev Physics Institute最新文献

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Calculation of the Resonance Line Emission of the Laser Plasma of Argon Clusters for H- and He-Like Ions
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602747
M. V. Sedov, S. N. Ryazantsev, I. Yu. Skobelev
{"title":"Calculation of the Resonance Line Emission of the Laser Plasma of Argon Clusters for H- and He-Like Ions","authors":"M. V. Sedov,&nbsp;S. N. Ryazantsev,&nbsp;I. Yu. Skobelev","doi":"10.3103/S1068335624602747","DOIUrl":"10.3103/S1068335624602747","url":null,"abstract":"<p>We report the construction of an analytical model that allows one to calculate the emission intensity of laser plasma which is generated by heating cluster targets with relativistic laser pulses. The results of particle-in-cell (PIC) calculation of plasma density and temperature obtained using the EPOCH software package are used as input parameters of the model. The constructed model is used to calculate the interaction of femtosecond laser pulses with an intensity of up to 10<sup>22</sup> W/cm<sup>2</sup> with large (0.5–2 μm) argon clusters. The emission duration and the total number of photons emitted in the resonance lines of He- and H-like argon ions are analyzed. It is shown how this model in combination with PIC calculation can be used to optimize the parameters of ultrafast X-ray sources.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S912 - S918"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533053","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
Spontaneous and Stimulated Raman Scattering in Sodium Dimolybdate Crystal
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602796
D. S. Chunaev, S. B. Kravtsov, V. E. Shukshin, V. N. Shlegel, V. D. Grigorieva, P. G. Zverev
{"title":"Spontaneous and Stimulated Raman Scattering in Sodium Dimolybdate Crystal","authors":"D. S. Chunaev,&nbsp;S. B. Kravtsov,&nbsp;V. E. Shukshin,&nbsp;V. N. Shlegel,&nbsp;V. D. Grigorieva,&nbsp;P. G. Zverev","doi":"10.3103/S1068335624602796","DOIUrl":"10.3103/S1068335624602796","url":null,"abstract":"<p>Investigation of spontaneous and stimulated Raman scattering in a crystal of sodium dimolybdate, Na<sub>2</sub>Mo<sub>2</sub>O<sub>7</sub> with an orthorhombic structure is presented. Polarized Raman spectra corresponding to six independent components of the Raman tensor have been obtained. The phonon frequencies were determined and the oscillations were identified by types of symmetry. Raman-laser mode in Na<sub>2</sub>Mo<sub>2</sub>O<sub>7</sub> has the highest frequency value among the molybdate crystals, equal to 939 cm<sup>–1</sup>. For the first time, Raman oscillation was obtained on a Na<sub>2</sub>Mo<sub>2</sub>O<sub>7</sub> crystal when excited by pulses of Nd:YLF laser with a wavelength of 1047 nm and a duration of 25 ps. The Raman gain coefficient at optimal orientation was 12.4 cm/GW, which is one of the highest values for solid-state Raman media. The described studies have shown that the sodium dimolybdate crystal is a promising nonlinear medium for creating a solid-state Raman converter.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S919 - S927"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533083","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
Generation of Strong Magnetic Fields in Cylindrical Shell Targets by an Intense Circularly Polarized Laser Pulse
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602760
A. A. Andreev, L. A. Litvinov, K. Yu. Platonov
{"title":"Generation of Strong Magnetic Fields in Cylindrical Shell Targets by an Intense Circularly Polarized Laser Pulse","authors":"A. A. Andreev,&nbsp;L. A. Litvinov,&nbsp;K. Yu. Platonov","doi":"10.3103/S1068335624602760","DOIUrl":"10.3103/S1068335624602760","url":null,"abstract":"<p>Based on analytical estimates and numerical simulation, we consider the generation of a superstrong magnetic field by a circularly polarized laser pulse in a laser target shaped as a hollow cylinder with a radius of a fraction of a micrometer. The amplitude and lifetime of the magnetic field in this target is shown to additionally increase due to the compression of the cylinder.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S887 - S902"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533200","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 Conversion Efficiency of Femtosecond Ytterbium Fiber Laser Pulses to the Mid-IR Range in AgGaS2, BaGa4Se7, and HgGa2S4 Crystals
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624601262
I. O. Kinyaevsky, N. A. Smirnov, A. V. Koribut, M. V. Ionin, S. I. Kudryashov, D. V. Badikov, G. K. Safaraliev
{"title":"The Conversion Efficiency of Femtosecond Ytterbium Fiber Laser Pulses to the Mid-IR Range in AgGaS2, BaGa4Se7, and HgGa2S4 Crystals","authors":"I. O. Kinyaevsky,&nbsp;N. A. Smirnov,&nbsp;A. V. Koribut,&nbsp;M. V. Ionin,&nbsp;S. I. Kudryashov,&nbsp;D. V. Badikov,&nbsp;G. K. Safaraliev","doi":"10.3103/S1068335624601262","DOIUrl":"10.3103/S1068335624601262","url":null,"abstract":"<p>The efficiency of AgGaS<sub>2</sub>, BaGa<sub>4</sub>Se<sub>7</sub>, and HgGa<sub>2</sub>S<sub>4</sub> crystals has been investigated in a mid-IR frequency difference generator based on a femtosecond ytterbium fiber laser with a wavelength of 1.03 μm, pulse duration of 0.25 ps, pulse repetition rate of 10 kHz, and average radiation power of 5 W. It is shown that under the given experimental conditions the highest efficiency of difference-frequency generation (up to ~7.5%) is achieved with a HgGa<sub>2</sub>S<sub>4</sub> crystal that provides 2 or 3 times higher energy of pulses with a wavelength of 4 to 7 μm (up to 6 μJ) without damaging it. In addition, this crystal yielded the longest wavelength of converted radiation—11 μm with pulse energy ~1 µJ.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S928 - S931"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533079","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 Absorption and Scattering Spectra of Semiconductor/Metal/J-Aggregate Hybrid Nanoshells
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602632
S. S. Moritaka, A. V. Mekshun, V. S. Lebedev
{"title":"Light Absorption and Scattering Spectra of Semiconductor/Metal/J-Aggregate Hybrid Nanoshells","authors":"S. S. Moritaka,&nbsp;A. V. Mekshun,&nbsp;V. S. Lebedev","doi":"10.3103/S1068335624602632","DOIUrl":"10.3103/S1068335624602632","url":null,"abstract":"<p>We report a study of optical properties of silver and gold nanoshells with a semiconductor core and an external organic layer of the molecular J-aggregate of the TDBC dye. Absorption and scattering cross sections of light are calculated using the generalized Mie theory for three values of the outer radius of the intermediate metal shell of the nanoparticle (10, 70, and 100 nm), with its thickness varying in the range from 0 to 20 nm. Qualitatively different behavior of the optical spectra of the studied nanostructures is demonstrated depending on their composition and geometric parameters. It is found that for the considered core materials (Si, GaP, and ZnSe) in the system in question, weak and strong plasmon–exciton coupling regimes can be implemented, including regimes exhibiting the induced transparency effect. It is shown that in the light scattering cross sections of three-layer ZnSe/Au/TDBC nanoparticles, the Fano antiresonance effect is observed, manifested in the asymmetric behavior of the spectral band contour. The above effects stem from the near-field electromagnetic coupling of dipole and multipole plasmons in the intermediate metal shell (Ag or Au) of the system with a semiconductor core and an outer organic excitonic shell. The results of the work contribute to a deeper understanding of the effects of near-field electromagnetic coupling in metal-containing organic–inorganic nanostructures. The studied nanoparticles are of interest for the development of new hybrid materials with specified optical properties and for the creation of a number of effective photonic devices on their basis, including highly sensitive sensors and photodetectors.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S932 - S944"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533080","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
Evolution of Electronic Properties of Tantalum Nanoclusters and of Tantalum Oxides in the Vicinity of Phase Transition to the Nonconducting State
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624601389
V. A. Shilov, D. V. Bortko, K. M. Balakhnev, P. V. Borisyuk, O. S. Vasilyev
{"title":"Evolution of Electronic Properties of Tantalum Nanoclusters and of Tantalum Oxides in the Vicinity of Phase Transition to the Nonconducting State","authors":"V. A. Shilov,&nbsp;D. V. Bortko,&nbsp;K. M. Balakhnev,&nbsp;P. V. Borisyuk,&nbsp;O. S. Vasilyev","doi":"10.3103/S1068335624601389","DOIUrl":"10.3103/S1068335624601389","url":null,"abstract":"<p>Core–shell samples of thin films of tantalum nanoclusters and of tantalum oxides on silicon were obtained. The chemical composition of Ta/TaO<sub>2</sub> nanoclusters was determined based on the results of X-ray photoelectron spectroscopic (XPS) analysis. The homogeneity of the thin nanocluster film composition was ascertained by the character of angular dependences of the ratios of the Ta4f doublet and oxygen peaks. The effect of a dimensional shift of binding energy was observed for metal tantalum nanoclusters with the diameter <i>d</i> &lt; 5 nm, and its dependence on the nanocluster diameter was established.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S945 - S950"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533081","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
On X-ray Spectral Diagnostics of Laser Plasma with External Photon Pumping
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602772
R. K. Kulikov, I. Yu. Skobelev, S. S. Makarov
{"title":"On X-ray Spectral Diagnostics of Laser Plasma with External Photon Pumping","authors":"R. K. Kulikov,&nbsp;I. Yu. Skobelev,&nbsp;S. S. Makarov","doi":"10.3103/S1068335624602772","DOIUrl":"10.3103/S1068335624602772","url":null,"abstract":"<p>The development of diagnostic methods for dense high-temperature plasma exposed to powerful streams of short-wave radiation is of particular relevance in connection with the planned construction in Russia of the SYLA, a MegaScience facility, which is an acceleration-storage complex that combines a fourth-generation synchrotron source and an X-ray free-electron laser, and with laser plasma experiments intensively conducted using hohlraum-type targets. The possibility is considered of this plasma diagnostics by one of the X-ray spectral techniques, namely by relative intensities of the resonant and intercombination lines of multicharged He-like ions. Based on detailed kinetic calculations, conditions are defined under which this technique can be applied to this plasma without any modification and relative intensities of these lines are calculated for cases when external effects significantly change the kinetics of their excitation.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S903 - S911"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533078","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
Use of Fiber Winding Methods in Ring Laser Resonators for Stabilization of Pulse Generation
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602802
D. V. Khudyakov, A. A. Semirenchenkov
{"title":"Use of Fiber Winding Methods in Ring Laser Resonators for Stabilization of Pulse Generation","authors":"D. V. Khudyakov,&nbsp;A. A. Semirenchenkov","doi":"10.3103/S1068335624602802","DOIUrl":"10.3103/S1068335624602802","url":null,"abstract":"<p>The paper presents a study of methods of winding of optical fiber for a mode-locked laser based on the nonlinear polarization rotation (NPR) effect in order to maximize stability of pulsed radiation to external temperature changes. Numerical simulation of pulse propagation in the fiber system of a pulse generator based on the NPR effect confirmed the advantage of volumetric winding over conventional flat winding. Various options of fiber laser resonator geometry are considered experimentally, and optimal parameters of fiber bends are found to ensure long-term stability of output radiation to changes in external temperature.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S951 - S961"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533082","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
Femtosecond Laser-Based Bioprinting
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-15 DOI: 10.3103/S1068335624601523
D. I. Ashikhmin, S. E. Minaev, N. V. Minaev, Yu. K. Sedova, S. I. Tsypina, V. I. Yusupov
{"title":"Femtosecond Laser-Based Bioprinting","authors":"D. I. Ashikhmin,&nbsp;S. E. Minaev,&nbsp;N. V. Minaev,&nbsp;Yu. K. Sedova,&nbsp;S. I. Tsypina,&nbsp;V. I. Yusupov","doi":"10.3103/S1068335624601523","DOIUrl":"10.3103/S1068335624601523","url":null,"abstract":"<p>The paper demonstrates the possibility of laser printing with hyaluronic acid-based hydrogel using femtosecond laser pulses and donor substrate without absorbing metal coating. Optimum parameters of laser exposure were determined to provide stable transfer wherein the initial velocity of microjets lies in the range of 60 to140 m/s. It is shown that when laser radiation is focused into the bulk of glass for the whole range of used laser pulse energies of 10 to 1000 μJ only an insignificant “swelling” of the hydrogel layer occurs without transfer. It is shown that photon impulses should be taken into account when using femtosecond radiation for printing. A needle hydrophone was used to estimate shock and acoustic waves that will affect living microsystems during the laser-based bioprinting process. When a femtosecond laser pulse with an energy of 250–1000 μJ is absorbed, a shock wave is formed, the amplitude of which can reach 10<sup>4</sup> atm at a distance of ~20 μm from the optical axis. These findings may be useful for the development of laser bioprinting technology and its promising area of laser engineering of microbial systems.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 10 supplement","pages":"S877 - S886"},"PeriodicalIF":0.6,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423440","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
A Ring Generator of Optical Spectral Combs Based on Fiber Bragg Structures with Controlled Parameters
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-15 DOI: 10.3103/S106833562460267X
A. S. Abramov, D. A. Korobko, P. P. Mironov
{"title":"A Ring Generator of Optical Spectral Combs Based on Fiber Bragg Structures with Controlled Parameters","authors":"A. S. Abramov,&nbsp;D. A. Korobko,&nbsp;P. P. Mironov","doi":"10.3103/S106833562460267X","DOIUrl":"10.3103/S106833562460267X","url":null,"abstract":"<p>The generation of optical radiation with a broadband comb spectrum in a ring fiber cavity with harmonic mode locking is discussed. The main element of the cavity is an active fiber Bragg structure whose spectral characteristics depend on the ambient temperature and mechanical actions. The influence of these parameters on the time and spectral characteristics of generated pulses was investigated within the framework of numerical modeling for the steady-state generation mode.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 10 supplement","pages":"S809 - S815"},"PeriodicalIF":0.6,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423250","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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