Bulletin of the Lebedev Physics Institute最新文献_第9页

Amplification of Attopulses Generated by Relativistic Laser Beams in an Inhomogeneous Dense Plasma 相对论性激光束在非均匀致密等离子体中产生的attopul脉冲放大

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625604765

A. A. Andreev, K. Yu. Platonov

引用次数: 0

The Effect of Pinning Center Configuration on Transient Processes at Microsecond Current Pulses 钉钉中心结构对微秒电流脉冲瞬态过程的影响

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625603875

A. N. Maksimova, A. N. Moroz, S. V. Pokrovskii, V. A. Kashurnikov

引用次数: 0

Synthesis and Characterization of CaAFe4As4 (A = K, Rb, Cs) Superconductors CaAFe4As4 （A = K, Rb, Cs）超导体的合成与表征

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625603929

A. S. Medvedev, V. A. Vlasenko, K. S. Pervakov

引用次数: 0

Modifying the Optical Properties of Biocompatible Polymers with Ultrashort Near-Infrared Laser Pulses 用超短近红外激光脉冲修饰生物相容性聚合物的光学特性

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625604789

Yu. S. Gulina, A. V. Gorevoy, N. A. Smirnov, P. P. Pakholchuk, E. N. Rimskaya, J. Zhu, S. N. Shelygina, K. B. Pershin, A. Yu. Tsygankov, S. I. Kudryashov

{"title":"Modifying the Optical Properties of Biocompatible Polymers with Ultrashort Near-Infrared Laser Pulses","authors":"Yu. S. Gulina, A. V. Gorevoy, N. A. Smirnov, P. P. Pakholchuk, E. N. Rimskaya, J. Zhu, S. N. Shelygina, K. B. Pershin, A. Yu. Tsygankov, S. I. Kudryashov","doi":"10.3103/S1068335625604789","DOIUrl":"10.3103/S1068335625604789","url":null,"abstract":"An experimental study was conducted on optimal modes for local optical property modification of polymethyl methacrylate (PMMA) and hydrophobic acrylic using focused (NA = 0.25) femtosecond laser pulses in the near-IR range (wavelengths of 1030 nm and 1557 nm). Modified regions measuring 3 to 10 μm in width and 30 to 200 μm in depth were obtained within the peak intensity range of 2.5–50 TW/cm2, with a controlled variation in refractive index ranging from 1 × 10–4 to 1 × 10–3. These regions are also characterized by increased intensity of Raman bands around 1350–1400 cm−1 in hydrophobic acrylic and 1610–1670 cm−1 in PMMA, which may be attributed to polymer chain scissions. The identified patterns suggest a similarity in the laser-induced changes and confirm the possibility of writing optically transparent phase elements in the volume of these materials. The method applied in this study shows promise in ophthalmology for creating individual refractive index profiles and postoperative correction of the optical power of intraocular lenses. Additionally, it has potential for manufacturing diffractive and integral micro-optical elements from biocompatible polymers.","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 13","pages":"S1368 - S1375"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579418","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

Spectral and Temporal Characteristics of Narrowband Superluminescence of NV– and C Centers in High-Pressure High-Temperature Diamond 高压高温金刚石中NV -和C中心窄带超发光的光谱和时间特性

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625604819

V. F. Lebedev, T. S. Misnikova, Ya. A. Ryvkina, E. A. Vasil’ev, I. V. Klepikov, A. V. Kolyadin, V. G. Vins

{"title":"Spectral and Temporal Characteristics of Narrowband Superluminescence of NV– and C Centers in High-Pressure High-Temperature Diamond","authors":"V. F. Lebedev, T. S. Misnikova, Ya. A. Ryvkina, E. A. Vasil’ev, I. V. Klepikov, A. V. Kolyadin, V. G. Vins","doi":"10.3103/S1068335625604819","DOIUrl":"10.3103/S1068335625604819","url":null,"abstract":"We report a study of narrowband superluminescence of a single-sector {111} high-pressure high-temperature (HPHT) diamond plate with NV– and C centers at a total nitrogen and NV– center concentrations of ~60 ppm and 11 ppm, respectively. The sample is optically pumped with pulsed laser radiation (λ = 532 nm) focused by a cylindrical lens (f = 60 mm). It is found that, in the region of the pump beam waist, the superluminescence spectra exhibit a pronounced fine structure, while the radiation pulse has a spike shape with an exponential decrease in pulse intensity over time. With additional pumping with continuous radiation at λ = 403 nm, an increase in the superluminescence intensity is recorded, and the number of intense peaks in the radiation pulse also increases. As the volume of the sample with a population inversion gradually increases by moving it away from the pump beam waist, the superluminescence intensity increases steadily, accompanied by spectrum smoothing, reaching a maximum at approximately a twofold increase in the pump volume. It is found that, with a smooth narrowband superluminescence spectrum, a short single pulse is generated as the narrowband superluminescence intensity approaches saturation.","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 13","pages":"S1393 - S1397"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579590","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

Transformation of Noise-Like Pulses into Loosely Bound Solitons in Er-Doped Fiber Laser 掺铒光纤激光器中类噪声脉冲向松束缚孤子的转换

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S106833562560439X

A. Y. Fedorenko, I. O. Orekhov, D. A. Dvoretskiy, Almikdad Ismaeel, S. G. Sazonkin, L. K. Denisov, V. E. Karasik

{"title":"Transformation of Noise-Like Pulses into Loosely Bound Solitons in Er-Doped Fiber Laser","authors":"A. Y. Fedorenko, I. O. Orekhov, D. A. Dvoretskiy, Almikdad Ismaeel, S. G. Sazonkin, L. K. Denisov, V. E. Karasik","doi":"10.3103/S106833562560439X","DOIUrl":"10.3103/S106833562560439X","url":null,"abstract":"This paper presents the findings of an experimental study of noise-like pulses and loosely bound solitons in an Er-doped fiber laser with hybrid mode-locking. The generation of noise-like pulses with a pedestal of 0.954 ps and a peak duration of 66 fs, as well as loosely bound two-pulse solitons with a duration of 141 fs and a pulse spacing of 7.31 ps, is demonstrated in dispersion-managed cavity. Experiments show that the formation of noise-like pulses and bound solitons in the region of positive net-cavity group velocity dispersion is associated with modulation instability-driven pulse splitting. This study also explores the influence of this mechanism on the temporal fluctuations of multipulse states, its manifestation in the spectral region, and its interaction with the quasi-periodic intensity modulation mechanism, which is also present in the modes under consideration. The transformation of one mode into another is examined in detail, and its association with changes in intracavity energy levels is elucidated.","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 13","pages":"S1425 - S1434"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579620","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

Magnetorheological Polishing of HTSC Substrates Based on Spherical Particles Obtained by the Liquid Anode Method 基于液体阳极法制备球形颗粒的HTSC基片磁流变抛光

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625603978

Yu. S. Baryshnikov, I. A. Rodionov, F. A. Orlov, A. D. Trofimuk, E. B. Pilgun, S. A. Ponyaev

引用次数: 0

Magnetic Pinning and Substantial Enhancement of Critical Current in Iron-Doped YBaCuO 掺铁YBaCuO中磁钉钉和临界电流的大幅增强

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625603802

K. S. Pigalskiy, A. A. Vishnev, N. N. Efimov, P. N. Vasilyev, A. V. Shabatin, L. I. Trakhtenberg

{"title":"Magnetic Pinning and Substantial Enhancement of Critical Current in Iron-Doped YBaCuO","authors":"K. S. Pigalskiy, A. A. Vishnev, N. N. Efimov, P. N. Vasilyev, A. V. Shabatin, L. I. Trakhtenberg","doi":"10.3103/S1068335625603802","DOIUrl":"10.3103/S1068335625603802","url":null,"abstract":"The present study investigates the dependences of the intragranular critical current density (Jc) and of the thermodynamic critical field (Hc) on the iron content (x) for samples with the composition Y1–xFexBa2Cu3Oy (0 ≤ x ≤ 0.06). The dependences of Jc(x) have a pronounced maximum at the optimum doping concentration, xopt ~ 0.04, corresponding to the average distance of ~ 2 nm between magnetic defects. The higher Jc at x ~ xopt, compared to the undoped sample, reaches two orders of magnitude in the external magnetic field, H = 1 T, at temperatures near 77 K. The value of xopt weakly depends on H and temperature. At the same time, unlike the type of dependences of Jc(x), Hc decreases monotonically with increasing x. A model explanation of the obtained results is proposed, based on the existence of normal regions in the vicinity of the defect, whose size is of the order of coherence lengths. There is no shielding of iron-ion moments within these regions when the sample transitions to a superconducting state. The mechanism of magnetic pinning caused by the interaction between the magnetic moment of a defect and the heterogeneous vortex lattice field is examined.","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 12","pages":"S1242 - S1247"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579152","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

Alternating Current Oscillation Shaper for Superconductor Research 超导体交流振荡成形器的研究

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625603966

E. P. Krasnoperov, N. S. Levchenko, A. V. Prutkov

引用次数: 0

The Features of Laser Microstructuring of PVDF Films with Nanosecond Pulses at 263 nm 263nm纳秒脉冲PVDF薄膜的激光微结构特征

IF 0.7 4区物理与天体物理

Bulletin of the Lebedev Physics Institute Pub Date : 2026-04-01 DOI: 10.3103/S1068335625604790

D. K. Derimedved, O. E. Sampara, E. L. Buryanskaya, E. O. Epifanov, P. A. Mikhalev, V. I. Yusupov, E. I. Mareev, N. V. Minaev

{"title":"The Features of Laser Microstructuring of PVDF Films with Nanosecond Pulses at 263 nm","authors":"D. K. Derimedved, O. E. Sampara, E. L. Buryanskaya, E. O. Epifanov, P. A. Mikhalev, V. I. Yusupov, E. I. Mareev, N. V. Minaev","doi":"10.3103/S1068335625604790","DOIUrl":"10.3103/S1068335625604790","url":null,"abstract":"This paper investigates laser microstructuring of ferroelectric polymer films based on polyvinylidene fluoride (PVDF) exposed to nanosecond UV radiation (λ = 263 nm). The selected irradiation parameters are found to ensure the formation of microgrooves and craters with minimal carbonization while maintaining the ferroelectric β phase, which was confirmed by Raman scattering (RS) spectroscopy. It is shown that the morphology of microstructures is sensitive to the focus position, and repeated laser irradiation improves their quality. Two characteristic energy density thresholds have been identified, corresponding to the transition from the material melting mode (Fth1 = 19 ± 12 J/cm2) to the thermal ablation mode (Fth2 = 50 ± 14 J/cm2). Fundamental differences in absorption mechanisms and ablation threshold modes have been established in comparison with similar results of treatment with femtosecond IR pulses (λ = 1032 nm). The study findings make the basis for developing functional micro- and nanoscale sensor elements and microelectronic devices based on PVDF.","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 13","pages":"S1376 - S1386"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579421","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