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Bulletin of the Lebedev Physics Institute最新文献

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Technological Features of Selective Laser Etching in the Processes of Internal Modification of Optical Quartz 光学石英内部改性过程中选择性激光蚀刻的工艺特点
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600093
S. S. Lyubin, M. A. Murzakov, I. I. Ryashko, D. A. Antipov, D. Yu. Kuznetsova
{"title":"Technological Features of Selective Laser Etching in the Processes of Internal Modification of Optical Quartz","authors":"S. S. Lyubin,&nbsp;M. A. Murzakov,&nbsp;I. I. Ryashko,&nbsp;D. A. Antipov,&nbsp;D. Yu. Kuznetsova","doi":"10.3103/S1068335625600093","DOIUrl":"10.3103/S1068335625600093","url":null,"abstract":"<p>A selective laser etching (SLT) technology has been developed and successfully applied for precision processing of quartz glass up to 2 mm thick. The technology has demonstrated efficiency for two operations: cutting and punching holes. The following parameters have been achieved: roughness, <i>Ra</i> = 0.2 μm and <i>Rz</i> = 0.4 μm; deviation from perpendicularity, 1°; and cutting width, from 10 to 45 μm. Technological intervals for pulse energy, speed, and frequency at which selective etching is possible have been identified. The maximum etching rate of laser-modified quartz glass with a hydrofluoric acid solution is 225 μm/h, indicating a selectivity of about 47 compared to the original glass.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1061 - S1069"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645410","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
Processes of Terahertz Radiation Generation during Emission of a Bunch of Electrons Accelerated by a Short Laser Pulse from a Metal/Plasma Target 金属/等离子体靶短激光脉冲加速电子束发射过程中产生太赫兹辐射的过程
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602723
A. V. Brantov, V. Yu. Bychenkov
{"title":"Processes of Terahertz Radiation Generation during Emission of a Bunch of Electrons Accelerated by a Short Laser Pulse from a Metal/Plasma Target","authors":"A. V. Brantov,&nbsp;V. Yu. Bychenkov","doi":"10.3103/S1068335624602723","DOIUrl":"10.3103/S1068335624602723","url":null,"abstract":"<p>A consistent description of terahertz (THz) radiation generation by laser-accelerated electrons from a target irradiated by a short light pulse requires a complete understanding of the contribution of all processes of interaction between emitted relativistic electrons and the target, taking into account the arising self-consistent fields. Despite the fact that the dominant role in this radiation is assumed a priori to be due to transition radiation from electrons leaving the target, in addition to this mechanism, it is necessary to estimate a set of such processes as bremsstrahlung of trapped electrons accelerating and decelerating in the Debye sheath, as well as their transition radiation and synchrotron radiation during the rotation of the double sheath field. This paper, which relies on a physically justified qualitative analysis, does not pretend to be a strict quantitative calculation and uses methodological techniques that aid understanding. Estimates are also presented that allow one to assess the characteristics of the generated THz pulse.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S969 - S974"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645469","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
Dye Laser Pumping by Semiconductor Injection Lasers 半导体注入激光器抽运染料激光
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S106833562560010X
O. A. Burdukova, V. A. Petukhov, M. A. Semenov
{"title":"Dye Laser Pumping by Semiconductor Injection Lasers","authors":"O. A. Burdukova,&nbsp;V. A. Petukhov,&nbsp;M. A. Semenov","doi":"10.3103/S106833562560010X","DOIUrl":"10.3103/S106833562560010X","url":null,"abstract":"<p>Semiconductor lasers are actively used for optical pumping of various solid-state lasers such as Nd:YAG, Nd:YVO<sub>4</sub>, Ti:Sapphire, Cr:Colquiriite, and Cr:Alexandrite among others. Diode pumping reduces considerably the overall dimensions of laser systems and cuts their cost. There have been repeated attempts to excite dye lasers with semiconductor lasers, but the efficiency of such systems was extremely low due to lack of pump radiation power. Acceptable results were produced only after the advent of high-power visible semiconductor lasers (445 nm and 520 nm, Nichia). Application of various methods of pumping by semiconductor lasers produced wide tuning ranges of laser wavelength (~200 nm), achieved high-efficiency (26%) lasing, carried out diode pumping of a continuous dye laser, and demonstrated mode-locking (pulse duration of about 200 ps). The following is an overview of research on diode pumping of dye lasers.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S994 - S1003"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645523","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
Gamma-Ray Source Based on Laser Acceleration of Electrons from Targets with a Low-Density Plasma Layer 基于激光加速低密度等离子体层靶电子的伽玛射线源
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602735
A. V. Brantov, M. A. Rakitina, S. I. Glazyrin, M. G. Lobok
{"title":"Gamma-Ray Source Based on Laser Acceleration of Electrons from Targets with a Low-Density Plasma Layer","authors":"A. V. Brantov,&nbsp;M. A. Rakitina,&nbsp;S. I. Glazyrin,&nbsp;M. G. Lobok","doi":"10.3103/S1068335624602735","DOIUrl":"10.3103/S1068335624602735","url":null,"abstract":"<p>We report a study of electron beams and gamma radiation generation from targets with a preplasma and from targets with an extended plasma of near-critical density on the irradiated side. It is shown that for a laser pulse with an energy of about 1 J, a uniform layer of critical density makes it possible to generate a significantly larger number of high-energy electrons compared to targets with an exponentially decaying preplasma profile produced by the prepulse. The bremsstrahlung gamma radiation spectra of accelerated electron beams in a converter target are constructed, and the possibility of converting the laser pulse energy into gamma radiation energy (with photon energies above 1 MeV) at a level of 5% is demonstrated.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1030 - S1036"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645434","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
Dynamic and Spectral Features of Superluminescence under Optical Pumping at λ = 532 nm in Synthetic HPHT Diamond with NV¯ Centers NV¯中心合成HPHT金刚石在λ = 532 nm光泵浦下的超发光动力学和光谱特征
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602644
V. F. Lebedev, E. A. Vasiliev, Ya. A. Ryvkina, I. V. Klepikov, T. S. Misnikova, A. V. Kolyadin, V. G. Vins
{"title":"Dynamic and Spectral Features of Superluminescence under Optical Pumping at λ = 532 nm in Synthetic HPHT Diamond with NV¯ Centers","authors":"V. F. Lebedev,&nbsp;E. A. Vasiliev,&nbsp;Ya. A. Ryvkina,&nbsp;I. V. Klepikov,&nbsp;T. S. Misnikova,&nbsp;A. V. Kolyadin,&nbsp;V. G. Vins","doi":"10.3103/S1068335624602644","DOIUrl":"10.3103/S1068335624602644","url":null,"abstract":"<p>A comparative analysis has been made of the superluminescence spectra of two HPHT diamond samples with NV¯-centers with the concentration in the growth sectors {111} of NV¯-centers ≈10 ppm and of C-centers ≈ 45 ppm. A broad structureless superluminescence band with a maximum about 706 nm and a narrow band in the region of 705 to 720 nm were identified in the spectral range of 650–750 nm when excited by pulsed laser radiation at λ = 532 nm. It was found that the narrow-band superluminescence was not excited by pumping with continuous radiation at λ = 532 nm and the intensities of both types of superluminescence were summated under simultaneous pumping by continuous and pulsed radiation at λ = 532 nm. These data indicate either the different nature of the two types of superluminescence or that they belonged to NV¯ centers but with different excitation mechanisms. The existence of connection between the shape of the spectra of narrow-band superluminescence and of radiation pulses has been demonstrated. The observed features of narrow-band superluminescence are explained for the first time by the occurrence of mode-locking laser generation. The mode-locking laser generation without the use of reflective coatings on the sample or an external resonator on other laser materials has not been observed before.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1022 - S1029"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645435","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
Development of Numerical Methods for Applications of Coherent Radiation in Studies of the Internal Structure of Objects (Part II) 相干辐射在物体内部结构研究中的数值方法发展（二）
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600123
A. S. Busarov, A. V. Vinogradov, N. L. Popov, I. A. Artyukov
{"title":"Development of Numerical Methods for Applications of Coherent Radiation in Studies of the Internal Structure of Objects (Part II)","authors":"A. S. Busarov,&nbsp;A. V. Vinogradov,&nbsp;N. L. Popov,&nbsp;I. A. Artyukov","doi":"10.3103/S1068335625600123","DOIUrl":"10.3103/S1068335625600123","url":null,"abstract":"<p>We consider single-beam 3D imaging, i.e., an approach to reconstructing the complex dielectric constant ε(<i>x</i>, <i>y</i>, <i>z</i>) of a sample in question by processing data read from a detector during successive illumination of a stationary object with different Gaussian beams along the same direction (angle). The propagation of Gaussian beams through an object is described using the parabolic wave equation. The equation for single-beam volume imaging is derived, which relates the data obtained on the detector with the values of the dielectric constants ε(<i>x</i>, <i>y</i>, <i>z</i>). As an example of solving this equation using optimization methods, a simplified case of purely real dielectric constant ε(<i>x</i>, <i>z</i>) in two-dimensional space is considered.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1010 - S1021"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645542","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
Lasing on Metastable Neon Atoms with Pulsed Transverse Optical Pumping 脉冲横向光泵浦对亚稳氖原子的激光作用
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624601936
A. P. Torbin, A. K. Chernyshov, N. I. Ufimtsev, M. I. Svistun, P. A. Mikheyev
{"title":"Lasing on Metastable Neon Atoms with Pulsed Transverse Optical Pumping","authors":"A. P. Torbin,&nbsp;A. K. Chernyshov,&nbsp;N. I. Ufimtsev,&nbsp;M. I. Svistun,&nbsp;P. A. Mikheyev","doi":"10.3103/S1068335624601936","DOIUrl":"10.3103/S1068335624601936","url":null,"abstract":"<p>Optically pumped metastable rare gas lasers (OPRGL) have been investigated. Lasing based on metastable neon (Ne*) atoms in a Ne–He mixture in a pulsed regime with transverse optical pumping was produced for the first time. Ne* was produced in the plasma of a nanosecond repetitively pulsed glow discharge with a frequency of 200 kHz. Pulsed optical pumping was provided by a dye laser at wavelengths corresponding to neon transitions of 1s<sub>5</sub> → 2p<sub>9</sub> (640.2 nm) and 1s<sub>5</sub> → 2p<sub>8</sub> (633.4 nm). The effect of various gain medium parameters on lasing characteristics was experimentally determined. Ne*–He OPRGL generation thresholds were measured by optical pump intensity of 1s<sub>5</sub> → 2p<sub>9</sub> and 1s<sub>5</sub> → 2p<sub>8</sub> transitions.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1037 - S1046"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645456","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 Effect of Pulse Duration on Properties of Boron Nanoparticles Produced by Laser Fragmentation of Micropowders in Liquids 脉冲时间对液体中激光破碎制备的硼纳米颗粒性能的影响
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/S1068335624602784
K. O. Aiyyzhy, M. S. Savinov, G. V. Tikhonovsky, A. A. Popov, D. I. Tselikov, I. V. Sozaev, A. A. Laktionov, M. V. Gorban, E. V. Barmina, M. S. Grigorieva, I. N. Zavestovskaya, S. M. Klimentov, A. V. Kabashin
{"title":"The Effect of Pulse Duration on Properties of Boron Nanoparticles Produced by Laser Fragmentation of Micropowders in Liquids","authors":"K. O. Aiyyzhy,&nbsp;M. S. Savinov,&nbsp;G. V. Tikhonovsky,&nbsp;A. A. Popov,&nbsp;D. I. Tselikov,&nbsp;I. V. Sozaev,&nbsp;A. A. Laktionov,&nbsp;M. V. Gorban,&nbsp;E. V. Barmina,&nbsp;M. S. Grigorieva,&nbsp;I. N. Zavestovskaya,&nbsp;S. M. Klimentov,&nbsp;A. V. Kabashin","doi":"10.3103/S1068335624602784","DOIUrl":"10.3103/S1068335624602784","url":null,"abstract":"<p>Optimization of laser synthesis regimes producing colloidal solutions of boron nanoparticles for their application as a promising boron-containing agent of boron neutron capture therapy (BNCT) of oncological diseases is an up to date trend in BNCT advancement. In this study, colloidal solutions of boron nanoparticles (BNPs) were synthesized by laser fragmentation in organic solvents using laser pulses of nanosecond and femtosecond duration range. The powder of the stable <sup>10</sup>B isotope of submicron fractions with arbitrary surface morphology served as starting material in both cases. The dependence of the properties of produced nanomaterials on the duration of laser pulses was compared directly.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S962 - S968"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533199","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
Calculation of the Resonance Line Emission of the Laser Plasma of Argon Clusters for H- and He-Like Ions 氩簇激光等离子体对H-和He-Like离子的共振线发射计算
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 二钼酸钠晶体的自发和受激拉曼散射
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
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