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Bulletin of the Lebedev Physics Institute最新文献

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A Study of the Nonlinear Optical Properties of Polydimethylsiloxane Interacting with 1030 nm Femtosecond Laser Pulses 聚二甲基硅氧烷与1030 nm飞秒激光相互作用的非线性光学性质研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-18 DOI: 10.3103/S1068335626600579
J. Zhu, Yu. S. Gulina, A. V. Gorevoy, N. I. Dolzhenko
{"title":"A Study of the Nonlinear Optical Properties of Polydimethylsiloxane Interacting with 1030 nm Femtosecond Laser Pulses","authors":"J. Zhu,&nbsp;Yu. S. Gulina,&nbsp;A. V. Gorevoy,&nbsp;N. I. Dolzhenko","doi":"10.3103/S1068335626600579","DOIUrl":"10.3103/S1068335626600579","url":null,"abstract":"<p>The characteristics of the nonlinear optical interaction of femtosecond laser pulses (250–2500 fs) at a wavelength of 1030 nm with polydimethylsiloxane (PDMS) were investigated using the Z-scan technique. It is demonstrated for the first time that the radiation attenuation in PDMS can be described within the peak intensity range up to 0.27 TW/cm<sup>2</sup> by five-photon absorption with a coefficient of β<sub>5</sub> = 750 ± 90 cm<sup>7</sup>/TW<sup>4</sup>. Nonmonotonic dependences of both nonlinear absorption and the nonlinear refractive index on the pulse duration were observed to exhibit peaks at 350 and 500 fs, respectively. These features are attributed to the competition between multiphoton and avalanche ionization processes. These findings provide an important foundation for high-precision laser modification of PDMS.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 2","pages":"S120 - S126"},"PeriodicalIF":0.6,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751622","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
Second Harmonic Generation during Femtosecond near IR Laser Pulse Filamentation in Air 空气中近红外激光脉冲成丝飞秒二次谐波的产生
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-18 DOI: 10.3103/S1068335626600610
T. A. Dick, G. E. Rizaev, A. V. Koribut, Ya. V. Grudtsyn, M. V. Levus, L. V. Seleznev
{"title":"Second Harmonic Generation during Femtosecond near IR Laser Pulse Filamentation in Air","authors":"T. A. Dick,&nbsp;G. E. Rizaev,&nbsp;A. V. Koribut,&nbsp;Ya. V. Grudtsyn,&nbsp;M. V. Levus,&nbsp;L. V. Seleznev","doi":"10.3103/S1068335626600610","DOIUrl":"10.3103/S1068335626600610","url":null,"abstract":"<p>Second harmonic generation during filamentation of femtosecond laser pulses in atmospheric air is investigated. Based on the analysis of spatial and spectral characteristics of the second harmonic, key factors affecting its generation are identified, such as the laser pulse energy and focusing conditions. The conversion efficiency to the second harmonic is on the order of ~10<sup>–10</sup>. The obtained results deepen the understanding of nonlinear interactions inside laser filaments and open new prospects for practical applications in atmospheric sensing and related fields.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 2","pages":"S153 - S159"},"PeriodicalIF":0.6,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751620","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
Diagnostics of Mechanical Fruit Damage Using Static Speckle Interferometry 用静态散斑干涉法诊断水果机械损伤
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-18 DOI: 10.3103/S1068335625604236
O. N. Budagovskaya, I. A. Budagovsky
{"title":"Diagnostics of Mechanical Fruit Damage Using Static Speckle Interferometry","authors":"O. N. Budagovskaya,&nbsp;I. A. Budagovsky","doi":"10.3103/S1068335625604236","DOIUrl":"10.3103/S1068335625604236","url":null,"abstract":"<p>The epidermal layer of fruits plays a key protective role, and its damage leads to rapid microbial contamination and loss of merchantability. Early detection of these defects during harvesting or prior to storage is of critical importance. We propose a method for the express diagnostics of mechanical abrasive (scuffing) damages to the fruit skin, based on the evaluation of the spatial coherence of the speckle structure of reflected laser radiation (static speckle interferometry). It is demonstrated that the intensity correlation radius of the reflected multimode semiconductor laser beam decreases significantly in areas of abrasive damage (by a factor of 1.4 to 1.8) compared to the intact skin. Scanning areas devoid of skin also yields a significantly lower variance of the correlation radius, which serves as a convenient secondary criterion for defect identification. The observed differences are attributed to a substantial increase in surface roughness and the effective size of the illuminated area within the damaged region. The method was tested on apples (Granny Smith) and pears (Osennyaya Yakovleva). It demonstrated high statistical significance of the differences. The method is robust against dynamic changes caused by the metabolic activity of tissues, it does not require complex optics or reconfiguration for different fruit types and can be implemented using inexpensive laser modules and web cameras. The application of fast Fourier transforms to calculate the correlation characteristics enables real-time surface integrity assessment, making the method promising for automated quality control on sorting lines.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 2","pages":"S185 - S196"},"PeriodicalIF":0.6,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751624","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
Determination of the Optimal Spatial Orientation of Bismuth Titanate in Forward Four-Wave Mixing 钛酸铋正向四波混频中最佳空间取向的确定
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335626600324
V. N. Naunyko
{"title":"Determination of the Optimal Spatial Orientation of Bismuth Titanate in Forward Four-Wave Mixing","authors":"V. N. Naunyko","doi":"10.3103/S1068335626600324","DOIUrl":"10.3103/S1068335626600324","url":null,"abstract":"<p>We report a study of the dependence of the optimized reflection coefficient in forward four-wave mixing on the spatial orientation of bismuth titanate. The formation of three holographic gratings with a phase–amplitude structure is examined during the interaction of light waves in a photorefractive crystal. Calculations are performed taking into account the anisotropy of the linear electro-optical, photoelastic, and inverse piezoelectric effects, as well as the optical activity, linear absorption, and circular dichroism of the crystal. It is shown that the efficiency of phase-conjugation diffraction in bismuth titanate depends markedly on the crystal sample cut. It is found that when using a Bi<sub>12</sub>TiO<sub>20</sub> crystal with a (111) cut, the reflection coefficient reaches 95% of the maximum possible value that can be obtained with the optimal spatial orientation of the bismuth titanate. The use of a crystal sample with (100) and (110) cuts leads to a nearly twofold decrease in the optimized reflection coefficient compared to the case of applying a crystal with a (111) cut.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S19 - S29"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752279","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
Functionalization of Single-Crystal Diamond by Excimer Laser: Creation of NV Centers and Surface Nanoablation 准分子激光对单晶金刚石的功能化：NV中心的形成和表面纳米烧蚀
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335625603425
M. S. Komlenok, M. A. Dezhkina, V. P. Pashinin, V. V. Kononenko, V. I. Konov, S. Ya. Kilin
{"title":"Functionalization of Single-Crystal Diamond by Excimer Laser: Creation of NV Centers and Surface Nanoablation","authors":"M. S. Komlenok,&nbsp;M. A. Dezhkina,&nbsp;V. P. Pashinin,&nbsp;V. V. Kononenko,&nbsp;V. I. Konov,&nbsp;S. Ya. Kilin","doi":"10.3103/S1068335625603425","DOIUrl":"10.3103/S1068335625603425","url":null,"abstract":"<p>The possibility of generating nitrogen-vacancy (NV) centers in diamond under prolonged exposure of the crystal surface to nanosecond UV pulses (193 nm and 248 nm, 20 ns) is demonstrated for the first time. The graphitization threshold (33 J/cm<sup>2</sup>) of a CVD diamond crystal was determined for the KrF laser, and the rates of surface nanoablation (photo-oxidative) etching developing below this threshold were measured. The dependencies of the NV center photoluminescence signal intensity on the number of laser pulses and energy density under KrF laser exposure were investigated. A 17-fold enhancement of the NV<sup>0</sup> line intensity was obtained after laser exposure at a wavelength of 248 nm with an energy density of 25 J/cm<sup>2</sup>.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S56 - S64"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752336","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
Quantitative X-Ray Spectroscopy of a High-Temperature Laser-Produced Plasma of Iron 高温激光产生的铁等离子体的定量x射线光谱
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335626600452
A. P. Shevelko
{"title":"Quantitative X-Ray Spectroscopy of a High-Temperature Laser-Produced Plasma of Iron","authors":"A. P. Shevelko","doi":"10.3103/S1068335626600452","DOIUrl":"10.3103/S1068335626600452","url":null,"abstract":"<p>We report the results of detailed X-ray spectroscopic diagnostics of a high-temperature laser-produced plasma of iron: the electron temperature is measured, and the absolute intensities of lines in the spectrum are determined. The plasma is generated by focusing laser radiation (0.53 μm, 2.3 J, 2 ns) onto a solid target. The spectra are recorded using an absolutely calibrated focusing crystal spectrometer. Using satellite lines near the resonance line of the [He]-like Fe XXV ion (wavelength λ = 1.85 Å), the electron temperature (<i>T</i><sub><i>e</i></sub> = 1250 eV) is measured and the absolute intensities of lines of various ionization stages (from the [He]-like Fe XXV ion to the [O]-like Fe XIX ion) are determined.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S1 - S3"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752339","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
Two-Photon Terahertz Quantum Cascade Laser in Strong Magnetic Fields 强磁场中的双光子太赫兹量子级联激光器
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335626600567
R. Kh. Zhukavin, K. A. Kovalevskii, D. A. Postnov, D. I. Kuritsyn, R. A. Khabibullin, D. V. Ushakov, A. A. Afonenko, D. S. Ponomarev, A. P. Vasil’ev, A. G. Kuzmenkov, N. A. Maleev, A. V. Antonov, A. A. Dubinov, S. V. Morozov, V. I. Gavrilenko
{"title":"Two-Photon Terahertz Quantum Cascade Laser in Strong Magnetic Fields","authors":"R. Kh. Zhukavin,&nbsp;K. A. Kovalevskii,&nbsp;D. A. Postnov,&nbsp;D. I. Kuritsyn,&nbsp;R. A. Khabibullin,&nbsp;D. V. Ushakov,&nbsp;A. A. Afonenko,&nbsp;D. S. Ponomarev,&nbsp;A. P. Vasil’ev,&nbsp;A. G. Kuzmenkov,&nbsp;N. A. Maleev,&nbsp;A. V. Antonov,&nbsp;A. A. Dubinov,&nbsp;S. V. Morozov,&nbsp;V. I. Gavrilenko","doi":"10.3103/S1068335626600567","DOIUrl":"10.3103/S1068335626600567","url":null,"abstract":"<p>The current–voltage and emission characteristics of a two-photon quantum cascade laser operating at frequencies of 3.1–3.9 THz and employing a resonant-phonon active-region design are measured in magnetic fields up to 11.5 T at liquid-helium temperature. Near resonant magnetic fields corresponding to the intersection of the zero Landau level associated with the upper laser state and the <i>n</i>th (<i>n</i> = 1–3) Landau levels associated with the lower laser state, the emission intensity is found to decrease, leading to complete suppression of lasing due to the onset of resonant scattering from the upper laser state by interface roughness, impurities, and acoustic phonons. In strong magnetic fields (ℏω<sub><i>c</i></sub> &gt; ℏω), where the cyclotron frequency exceeds the laser frequency, a several-fold reduction in the threshold current is demonstrated due to the nullification of electron states and the suppression of parasitic scattering processes.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S12 - S18"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752340","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
Catalytic Degradation of Brilliant Green by Laser-Transferred Palladium Nanoparticles 激光转移钯纳米颗粒催化降解亮绿
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335625604169
E. V. Ulturgasheva, A. A. Nastulyavichus, S. P. Babina, N. S. Pokryshkin, S. I. Kudryashov
{"title":"Catalytic Degradation of Brilliant Green by Laser-Transferred Palladium Nanoparticles","authors":"E. V. Ulturgasheva,&nbsp;A. A. Nastulyavichus,&nbsp;S. P. Babina,&nbsp;N. S. Pokryshkin,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335625604169","DOIUrl":"10.3103/S1068335625604169","url":null,"abstract":"<p>The photocatalytic properties of palladium nanoparticles synthesized by laser-induced forward transfer are investigated using the degradation of the brilliant green dye under various irradiation conditions. The experiments are performed both under UV irradiation and in the absence of light.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S77 - S83"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752278","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
Hall Effects during Spherical Laser-Plasma Cloud Expansion into a Magnetized Background Plasma (Laboratory Experiments and Numerical Simulations) 球形激光等离子体云向磁化背景等离子体膨胀过程中的霍尔效应（实验室实验和数值模拟）
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335626600403
A. A. Chibranov, I. F. Shaikhislamov, A. V. Divin, A. G. Berezutskii, Yu. P. Zakharov, I. B. Miroshnichenko, I. P. Paramonik, V. G. Posukh, M. S. Rumenskikh, A. E. Ivanov, M. V. Loginov
{"title":"Hall Effects during Spherical Laser-Plasma Cloud Expansion into a Magnetized Background Plasma (Laboratory Experiments and Numerical Simulations)","authors":"A. A. Chibranov,&nbsp;I. F. Shaikhislamov,&nbsp;A. V. Divin,&nbsp;A. G. Berezutskii,&nbsp;Yu. P. Zakharov,&nbsp;I. B. Miroshnichenko,&nbsp;I. P. Paramonik,&nbsp;V. G. Posukh,&nbsp;M. S. Rumenskikh,&nbsp;A. E. Ivanov,&nbsp;M. V. Loginov","doi":"10.3103/S1068335626600403","DOIUrl":"10.3103/S1068335626600403","url":null,"abstract":"<p>We report a comprehensive study of Hall effects during the sub-Alfvén expansion of a spherical plasma cloud into a magnetized background plasma in the weakly magnetized ion regime. A laboratory experiment on the KI-1 large-scale laser-plasma facility and kinetic numerical simulations using the IPIC3D hybrid code demonstrate that the Hall effects are suppressed with increasing background plasma concentration, yielding good agreement between the experiment and simulations. This is evident in the nature and rate of magnetic field re-penetration into the displaced volume during the diamagnetic cavity collapse phase.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S84 - S96"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752338","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
Increasing the Catastrophic Optical Damage Threshold to 500 mW in 800–900 nm SLDs with Broadened Waveguide Layers 加宽波导层的800-900 nm sld中灾难性光损伤阈值提高到500mw
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2026-08-15 DOI: 10.3103/S1068335626600300
V. F. Senko, S. N. Ilchenko, M. N. Orlova
{"title":"Increasing the Catastrophic Optical Damage Threshold to 500 mW in 800–900 nm SLDs with Broadened Waveguide Layers","authors":"V. F. Senko,&nbsp;S. N. Ilchenko,&nbsp;M. N. Orlova","doi":"10.3103/S1068335626600300","DOIUrl":"10.3103/S1068335626600300","url":null,"abstract":"<p>The effect of waveguide layer thickness on basic characteristics of high-power superluminescent diodes (SLDs) emitting in the 800–900 nm spectral range has been investigated. These were based on separate-confinement heterostructures within the system of AlGaAs/GaAs/InGaAs materials fabricated by the metalorganic chemical vapor deposition (MOCVD) method. The catastrophic optical damage (COD) threshold is shown to increase with increasing waveguide layer thickness, while the far-field divergence and differential quantum efficiency remain at acceptable levels. It is demonstrated that the maximum optical output power of SLDs can reach 500 mW in continuous-wave (CW) mode while maintaining a single-transverse-mode regime.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"53 1","pages":"S30 - S35"},"PeriodicalIF":0.6,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752276","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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