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Artykuły w czasopismach na temat „Lasers attoseconde”

Autor: Grafiati

Data publikacji: 25 stycznia 2025

Data aktualizacji: 31 lipca 2025

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1

Dobosz Dufrenoy, Sandrine, Thierry Ruchon, Henri Vincenti, et al. "De l’ultra-rapide à l’ultra-intense : de nouveaux champs d’études." Photoniques, no. 118 (2023): 40–45. http://dx.doi.org/10.1051/photon/202311840.

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Le développement spectaculaire des lasers de puissance ces trente dernières années a ouvert de nouveaux champs d’études : la science attoseconde d’une part, l’optique relativiste d’autre part. Nous illustrons les nouvelles perspectives ouvertes dans divers domaines de la physique, la chimie, la médecine ou la science des matériaux à partir d’études effectuées sur les plateformes ATTOLab et UHI100 du Laboratoire Interactions, Dynamiques et Lasers (LIDYL) du CEA Paris-Saclay.

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Xiao, Yaozong, Chao Feng, and Bo Liu. "Generating Isolated Attosecond X-Ray Pulses by Wavefront Control in a Seeded Free-Electron Laser." Ultrafast Science 2022 (July 30, 2022): 1–8. http://dx.doi.org/10.34133/2022/9812478.

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We proposed a simple method based on the seeded free-electron laser (FEL) to generate fully coherent X-ray pulses with durations at dozens of attosecond level. The echo-enabled harmonic generation technique is utilized to generate the fully coherent laser pulse covering the water-window range. A wavefront rotation laser is adopted as the seed to tailor the longitudinal contour of the radiation pulse. Due to the sensitivity of seeded FEL to external lasers, this method can effectively inhibit the bunching of the adjacent regions while preserving an isolated bunching in the middle. Sending such

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3

Li, Siqi, Taran Driver, Philipp Rosenberger, et al. "Attosecond coherent electron motion in Auger-Meitner decay." Science 375, no. 6578 (2022): 285–90. http://dx.doi.org/10.1126/science.abj2096.

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In quantum systems, coherent superpositions of electronic states evolve on ultrafast time scales (few femtoseconds to attoseconds; 1 attosecond = 0.001 femtoseconds = 10 −18 seconds), leading to a time-dependent charge density. Here we performed time-resolved measurements using attosecond soft x-ray pulses produced by a free-electron laser, to track the evolution of a coherent core-hole excitation in nitric oxide. Using an additional circularly polarized infrared laser pulse, we created a clock to time-resolve the electron dynamics and demonstrated control of the coherent electron motion by tu

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4

Huang, Yindong, Jing Zhao, Zheng Shu, et al. "Ultrafast Hole Deformation Revealed by Molecular Attosecond Interferometry." Ultrafast Science 2021 (July 7, 2021): 1–12. http://dx.doi.org/10.34133/2021/9837107.

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Understanding the evolution of molecular electronic structures is the key to explore and control photochemical reactions and photobiological processes. Subjected to strong laser fields, electronic holes are formed upon ionization and evolve in the attosecond timescale. It is crucial to probe the electronic dynamics in real time with attosecond-temporal and atomic-spatial precision. Here, we present molecular attosecond interferometry that enables the in situ manipulation of holes in carbon dioxide molecules via the interferometry of the phase-locked electrons (propagating in opposite direction

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5

Serrano, Javier, José Miguel Pablos-Marín, and Carlos Hernández-García. "Machine-learning applied to the simulation of high harmonic generation driven by structured laser beams." EPJ Web of Conferences 287 (2023): 13018. http://dx.doi.org/10.1051/epjconf/202328713018.

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High harmonic generation (HHG) is one of the richest processes in strong-field physics. It allows to up-convert laser light from the infrared domain into the extreme-ultraviolet or even soft x-rays, that can be synthesized into laser pulses as short as tens of attoseconds. The exact simulation of such highly non-linear and non-perturbative process requires to couple the laser-driven wavepacket dynamics given by the three-dimensional time-dependent Schrödinger equation (3D-TDSE) with the Maxwell equations to account for macroscopic propagation. Such calculations are extremely demanding, well be

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6

Vinbladh, Jimmy, Jan Marcus Dahlström, and Eva Lindroth. "Relativistic Two-Photon Matrix Elements for Attosecond Delays." Atoms 10, no. 3 (2022): 80. http://dx.doi.org/10.3390/atoms10030080.

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The theory of one-photon ionization and two-photon above-threshold ionization is formulated for applications to heavy atoms in attosecond science by using Dirac–Fock formalism. A direct comparison of Wigner–Smith–Eisenbud delays for photoionization is made with delays from the Reconstruction of Attosecond Beating By Interference of Two-photon Transitions (RABBIT) method. Photoionization by an attosecond pulse train, consisting of monochromatic fields in the extreme ultraviolet range, is computed with many-body effects at the level of the relativistic random phase approximation (RRPA). Subseque

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7

Hu, Ronghao, Zheng Gong, Jinqing Yu, et al. "Ultrahigh brightness attosecond electron beams from intense X-ray laser driven plasma photocathode." International Journal of Modern Physics A 34, no. 34 (2019): 1943012. http://dx.doi.org/10.1142/s0217751x19430127.

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The emerging intense attosecond X-ray lasers can extend the Laser Wakefield Acceleration mechanism to higher plasma densities in which the acceleration gradients are greatly enhanced. Here we present simulation results of high quality electron acceleration driven by intense attosecond X-ray laser pulses in liquid methane. Ultrahigh brightness electron beams can be generated with 5-dimensional beam brightness over [Formula: see text]. The pulse duration of the electron bunch can be shorter than 20 as. Such unique electron sources can benefit research areas requiring crucial spatial and temporal

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8

Li, Qianni, Xinrong Xu, Yanbo Wu, Debin Zou, Yan Yin, and Tongpu Yu. "Generation of single circularly polarized attosecond pulses from near-critical density plasma irradiated by a two-color co-rotating circularly polarized laser." Optics Express 30, no. 22 (2022): 40063. http://dx.doi.org/10.1364/oe.472982.

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In this paper, a new method is proposed to efficiently generate a single intense attosecond pulse with circular polarization (CP) through the interaction of an intense driving laser with a near-critical density plasma target. The driving laser is composed of two co-rotating CP lasers with similar frequencies but different pulse widths. When the matching condition is satisfied, the combined field is modulated to a short intense pulse followed by a weak tail. The resulting laser falling edge becomes steeper than the initial sub-pulses, which induces a quick one-time oscillation of the target sur

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9

Wikmark, Hampus, Chen Guo, Jan Vogelsang, et al. "Spatiotemporal coupling of attosecond pulses." Proceedings of the National Academy of Sciences 116, no. 11 (2019): 4779–87. http://dx.doi.org/10.1073/pnas.1817626116.

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The shortest light pulses produced to date are of the order of a few tens of attoseconds, with central frequencies in the extreme UV range and bandwidths exceeding tens of electronvolts. They are often produced as a train of pulses separated by half the driving laser period, leading in the frequency domain to a spectrum of high, odd-order harmonics. As light pulses become shorter and more spectrally wide, the widely used approximation consisting of writing the optical waveform as a product of temporal and spatial amplitudes does not apply anymore. Here, we investigate the interplay of temporal

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10

Zhang, Yi, Conglin Zhong, Shaoping Zhu, Xiantu He, and Bin Qiao. "Divergence gating towards far-field isolated attosecond pulses." New Journal of Physics 24, no. 3 (2022): 033038. http://dx.doi.org/10.1088/1367-2630/ac59ec.

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Abstract Divergence gating, a novel method to generate far-field isolated attosecond pulses (IAPs) through controlling divergences of different pulses, is proposed and realized by relativistic chirped laser–plasma interactions. Utilizing various wavefronts for different cycles of incident chirped lasers, reflected harmonics with minimum divergences are obtained only at the peak cycle when plasma targets are adjusted to proper distances from foci of lasers. Therefore, the corresponding attosecond pulse is isolated in far field due to much slower decay during propagation than others. Confirmed b

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11

Ye, Peng, Lénárd Gulyás Oldal, Tamás Csizmadia, et al. "High-Flux 100 kHz Attosecond Pulse Source Driven by a High-Average Power Annular Laser Beam." Ultrafast Science 2022 (March 1, 2022): 1–10. http://dx.doi.org/10.34133/2022/9823783.

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High-repetition rate attosecond pulse sources are indispensable tools for time-resolved studies of electron dynamics, such as coincidence spectroscopy and experiments with high demands on statistics or signal-to-noise ratio, especially in the case of solid and big molecule samples in chemistry and biology. Although with the high-repetition rate lasers, such attosecond pulses in a pump-probe configuration are possible to achieve, until now, only a few such light sources have been demonstrated. Here, by shaping the driving laser to an annular beam, a 100 kHz attosecond pulse train (APT) is repor

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12

Gheorghe, M., F. P. G. Stochioiu, D. Manolache, M. R. Dijmărescu, and D. Iliescu. "Analysis and development on general structure and characteristics of laser interferometry systems." IOP Conference Series: Materials Science and Engineering 1268, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1757-899x/1268/1/012010.

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The laser interferometry systems have been developed for scientific studies, industrial operations, artworks investigation, etc. They present common generic elements, such as laser, optics, beam, polarization, splitting, interferometry, etc., but also diverse specific components and features,such as He-Ne or femtosecond laser, quantum cascade lasers, non-polarising beam splitter, collimating lens, high reflecting mirror, photodetector, attosecond pulse train, etc., as the case. The paper presents, also, a development on general structure and characteristics of laser interferometry systems. Ana

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13

Johnson, Allan S., Timur Avni, Esben W. Larsen, Dane R. Austin, and Jon P. Marangos. "Attosecond soft X-ray high harmonic generation." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, no. 2145 (2019): 20170468. http://dx.doi.org/10.1098/rsta.2017.0468.

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High harmonic generation (HHG) of an intense laser pulse is a highly nonlinear optical phenomenon that provides the only proven source of tabletop attosecond pulses, and it is the key technology in attosecond science. Recent developments in high-intensity infrared lasers have extended HHG beyond its traditional domain of the XUV spectral range (10–150 eV) into the soft X-ray regime (150 eV to 3 keV), allowing the compactness, stability and sub-femtosecond duration of HHG to be combined with the atomic site specificity and electronic/structural sensitivity of X-ray spectroscopy. HHG in the soft

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14

Feng, Liqiang, Hang Liu, and Tianshu Chu. "Attosecond XUV sources generation from polarized gating two-color chirped pulse." Modern Physics Letters B 29, no. 21 (2015): 1550111. http://dx.doi.org/10.1142/s0217984915501110.

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A promising method to generate the attosecond XUV sources from the high-order harmonic has been theoretically presented by controlling the polarized gating two-color chirped pulse. The results show that with the introduction of the chirps, the harmonic has been remarkably extended. Moreover, the harmonic interferences are very sensitive to the polarization angle between the two lasers. Particularly, when the polarization angle is equal to [Formula: see text], the supercontinuum with a single quantum path contribution is achieved, and a series of isolated attosecond pulses with the duration of

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15

Salières, Pascal, Thierry Ruchon, and Bertrand Carré. "Les lasers attosecondes." Photoniques, no. 48 (September 2010): 40–41. http://dx.doi.org/10.1051/photon/20104840.

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16

Kennedy, J. P., B. Dromey, and M. Yeung. "Isolated ultra-bright attosecond pulses via non-collinear gating." New Journal of Physics 24, no. 11 (2022): 113004. http://dx.doi.org/10.1088/1367-2630/ac9b80.

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Abstract When light with relativistic intensity is incident on a solid target, bright attosecond pulses of extreme ultraviolet and x-ray radiation can be generated in the reflected beam. Unfortunately, the use of multi-cycle laser pulses results in trains of these attosecond pulses. Here we investigate a non-collinear gating scheme applied to surface high-harmonic generation to allow for the extraction of a single intense attosecond pulse from this train. Using 3D and 2D particle in cell (PIC) simulations we demonstrate that it is possible to angularly isolate a single attosecond pulse from th

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17

Dombi, Péter, and Reinhard Kienberger. "A nobel prize for attosecond physics based on extreme nonlinear optics." Europhysics News 55, no. 1 (2024): 16–21. http://dx.doi.org/10.1051/epn/2024106.

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Nobel Prizes related to lasers are awarded for their application in pioneering research areas, as was the case in 2023. Lasers are closely linked to 13-14 Physics Prizes, involving new discoveries, inventions, or research methods. The list is long, including optical fibers, optical tweezers, frequency combs, femtochemistry research, and research related to trapped particles. Lasers also play a crucial role in detecting gravitational waves and in holography. The 2023 award fits into this powerful series. The Prize and the oeuvre of Pierre Agostini, Ferenc Krausz and Anne L’Huillier shows how st

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18

Liu, Y., F. Y. Li, M. Zeng, M. Chen, and Z. M. Sheng. "Ultra-intense attosecond pulses emitted from laser wakefields in non-uniform plasmas." Laser and Particle Beams 31, no. 2 (2013): 233–38. http://dx.doi.org/10.1017/s0263034613000220.

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AbstractA scheme of generating ultra-intense attosecond pulses in ultra-relativistic laser interaction with under-dense plasmas is proposed. The attosecond pulse emission is caused by an oscillating transverse current sheet formed by an electron density spike composed of trapped electrons in the laser wakefield and the residual transverse momentum of electrons left behind the laser pulse when its front is strongly modulated. As soon as the attosecond pulse emerges, it tends to feed back to further enhance the transverse electron momentum and the transverse current. Consequently, the attosecond

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19

Deng, Aihua, Yan Li, Yugan Weng, Zhiling Luo, Xitao Yu, and Jiaolong Zeng. "Simulation Study on Attosecond Inverse Compton Scattering Source from Laser Wakefield Acceleration with Near-Threshold Ionization Injection." Applied Sciences 14, no. 17 (2024): 7749. http://dx.doi.org/10.3390/app14177749.

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We present the generation of attosecond gamma rays via inverse Compton scattering within the framework of laser wakefield acceleration through 2D Particle-In-Cell simulations. Utilizing the near-threshold ionization injection mechanism, an attosecond micro-bunched electron beam characterized by a comb-like current density profile can be achieved with a linearly polarized laser at an intensity of a0 = 1.5. The micro-bunched beam provides a beam energy of approximately 300 MeV and achieves a minimum relative energy spread of about 1.64% after undergoing 2 mm of acceleration. In the inverse Compt

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20

Su, Xinyang, Ruixue Zhu, Bolin Wang та ін. "Generation of 8–20 μm Mid-Infrared Ultrashort Femtosecond Laser Pulses via Difference Frequency Generation". Photonics 9, № 6 (2022): 372. http://dx.doi.org/10.3390/photonics9060372.

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Mid-infrared (MIR) ultrashort laser pulses have a wide range of applications in the fields of environmental monitoring, laser medicine, food quality control, strong-field physics, attosecond science, and some other aspects. Recent years have seen great developments in MIR laser technologies. Traditional solid-state and fiber lasers focus on the research of the short-wavelength MIR region. However, due to the limitation of the gain medium, they still cannot cover the long-wavelength region from 8 to 20 µm. This paper summarizes the developments of 8–20 μm MIR ultrafast laser generation via diff

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21

Schoenlein, Robert, Thomas Elsaesser, Karsten Holldack, et al. "Recent advances in ultrafast X-ray sources." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, no. 2145 (2019): 20180384. http://dx.doi.org/10.1098/rsta.2018.0384.

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Over more than a century, X-rays have transformed our understanding of the fundamental structure of matter and have been an indispensable tool for chemistry, physics, biology, materials science and related fields. Recent advances in ultrafast X-ray sources operating in the femtosecond to attosecond regimes have opened an important new frontier in X-ray science. These advances now enable: (i) sensitive probing of structural dynamics in matter on the fundamental timescales of atomic motion, (ii) element-specific probing of electronic structure and charge dynamics on fundamental timescales of ele

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22

Ang-Yang, Yu. "About Efficiency of High-order Harmonic Generation in Attosecond Physics." International Journal of Clinical Virology 8, no. 2 (2024): 045–47. http://dx.doi.org/10.29328/journal.ijcv.1001061.

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For the first time, the interaction between Hydrogen atom and Free-Electron Lasers (FEL) is simulated. The conversion efficiency of High-order Harmonic Generation (HHG) can be enhanced by utilizing a two-color free electron laser with frequency multiplication. It is found that the conversion efficiency of HHG is improved to the largest extent when fourth-fold frequency multiplication is introduced into two-color FEL. The microscopic mechanism of improving the efficiency of HHG is analyzed and discussed.

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Glek, P. B., and A. M. Zheltikov. "Subcycle terahertz field waveforms clocked by attosecond high-harmonic pulses from relativistic laser plasmas." Journal of Applied Physics 131, no. 10 (2022): 103104. http://dx.doi.org/10.1063/5.0070670.

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A high-intensity ultrashort laser pulse interacting with a thin plasma target is shown to couple to plasma electrons, driving electron oscillations within the plasma and making these electrons bounce back and forth between plasma boundaries. Each time these recirculating electrons traverse the plasma boundary, they emit bright subcycle terahertz (THz) field waveforms via laser-driven coherent transition radiation. As a concurrent process, laser-driven electrons near the front surface of the plasma target are accelerated to relativistic velocities to emit high-order harmonics (HHs), giving rise

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24

WANG Huiyong, LI Mingxuan, LUO Sizuo, and DING Dajun. "Research Progress on High-Energy-Resolution Photoelectron Interferometer." Acta Physica Sinica 74, no. 15 (2025): 0. https://doi.org/10.7498/aps.74.20250534.

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In recent years, the development of attosecond extreme ultraviolet (XUV) pulse generation and advanced spectroscopic techniques has provided powerful tools for investigating electron dynamics. Studies on the attosecond timescale enable real-time tracking of electronic motion in atoms and molecules, allowing the measurement of electron wave packet evolution and quantum characteristics, which are crucial for revealing complex dynamical processes within atomic and molecular systems. High-resolution photoelectron interferometers based on attosecond XUV pulse trains have played an essential role in

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25

Kern, Christian, Michael Zürch, and Christian Spielmann. "Limitations of Extreme Nonlinear Ultrafast Nanophotonics." Nanophotonics 4, no. 3 (2015): 303–23. http://dx.doi.org/10.1515/nanoph-2015-0013.

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Abstract High-harmonic generation (HHG) has been established as an indispensable tool in optical spectroscopy. This effect arises for instance upon illumination of a noble gas with sub-picosecond laser pulses at focussed intensities significantly greater than 1012W/cm2. HHG provides a coherent light source in the extreme ultraviolet (XUV) spectral region, which is of importance in inner shell photo ionization of many atoms and molecules. Additionally, it intrinsically features light fields with unique temporal properties. Even in its simplest realization, XUV bursts of sub-femtosecond pulse le

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Xu, Peng, Xianglin Wang, Huabao Cao, et al. "Non-Collinear Attosecond Streaking without the Time Delay Scan." Photonics 10, no. 3 (2023): 331. http://dx.doi.org/10.3390/photonics10030331.

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Attosecond streaking provides an extremely high temporal resolution for characterizing light pulses and photoionization processes with attosecond (10−18 s) accuracy, which employs a laser as a streaking field to deflect electrons generated by photoionization. The current attosecond streaking requires a time delay scan between the attosecond pulses and streaking field with attosecond accuracy and a femtosecond range, which is difficult to realize real-time measurement. In this study, we theoretically propose a non-collinear attosecond streaking scheme without the time delay scan, enabling real-

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Chini, Michael, Steve Gilbertson, Sabih D. Khan, and Zenghu Chang. "Characterizing ultrabroadband attosecond lasers." Optics Express 18, no. 12 (2010): 13006. http://dx.doi.org/10.1364/oe.18.013006.

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Kumar, Sandeep, Heung-Sik Kang, and Dong-Eon Kim. "For the generation of an intense isolated pulse in hard X-ray region using X-ray free electron laser." Laser and Particle Beams 30, no. 3 (2012): 397–406. http://dx.doi.org/10.1017/s0263034612000237.

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AbstractFor a real, meaningful pump-probe experiment with attosecond temporal resolution, an intense isolated attosecond pulse is in demand. For that purpose we report the generation of an intense isolated attosecond pulse, especially in X-ray region using a current-enhanced self-amplified spontaneous emission in a free electron laser (FEL). We use a few cycle laser pulse to manipulate the electron-bunch inside a two-period planar wiggler. In our study, we employ the electron beam parameters of Pohang Accelerator Laboratory (PAL)-XFEL. The RF phase effect of accelerator columns on the longitud

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Hosseinzadeh, Forouq, Vahid Darvishzadeh, and Saeed Batebi. "High harmonic generation in organic molecules: a time-dependent density functional theory (TDDFT) approach." Laser Physics 35, no. 2 (2025): 025401. https://doi.org/10.1088/1555-6611/ada754.

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Abstract We explore the fascinating process of high harmonic generation (HHG) in organic molecules, using time-dependent density functional theory to delve into the behaviors of methane, acetylene, benzene, and octane under varying laser conditions. Benzene, with its lower ionization potential and delocalized π-electrons, exhibited the most efficient harmonic generation, driven by the dominance of long electron trajectories that align well with the attosecond pulses produced. By carefully combining harmonics from the plateau region, we were able to generate an eighty attosecond pulse. Our stud

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Guo, Zhiyuan. "Research on the ultrafast laser in microscopy." Theoretical and Natural Science 13, no. 1 (2023): 226–31. http://dx.doi.org/10.54254/2753-8818/13/20240851.

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Ultrafast laser technology has been making a huge difference in different areas, such as material processing, laser surgery, and military usage. In parallel with the development of ultrafast lasers, microscopy also greatly promotes modern science, even though there are still some shortcomings, and one of them is that it is hard to obtain information about dynamic samples. However, this shortcoming can be solved by using ultrafast laser technology. This review will introduce the concept of ultrafast laser technology and electron microscopy, while several limitations of conventional electron mic

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Shi Zhuo, Chang Hong-Xiang, Wang Dong-Liang, et al. "High power, high energy four-channel fiber coherent beam combining system." Acta Physica Sinica 74, no. 1 (2025): 0. http://dx.doi.org/10.7498/aps.74.20241476.

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Objective: Ultrafast fiber laser sources with mJ-level pulse energy and kilo-watt average power are of particular importance for various science fields such as attosecond lasers. Nowadays, several attosecond laser large scale facilities are under construction, including ELI-ALPS in Europe, SECUF in China, NeXUS in America and ALFA in Japan, to name a few. High performance femtosecond driven lasers are crucial for attosecond lasers and various ultrafast laser facilities. Fiber lasers have large surface-to-volume ratio for efficient cooling, and are suitable for high average power amplification.

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Teng Hao, 滕浩, 钟诗阳 Zhong Shiyang, 贺新奎 He Xinkui та ін. "阿秒激光束线及应用研究平台（特邀）". Acta Optica Sinica 44, № 17 (2024): 1732016. http://dx.doi.org/10.3788/aos241424.

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Teng, Hao, Xin-Kui He, Kun Zhao, and Zhi-Yi Wei. "Attosecond laser station." Chinese Physics B 27, no. 7 (2018): 074203. http://dx.doi.org/10.1088/1674-1056/27/7/074203.

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Hellemans, Alexander. "Attosecond Laser Pulses." Scientific American 290, no. 5 (2004): 38. http://dx.doi.org/10.1038/scientificamerican0504-38b.

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Li, Yizhang, Qingyu Yang, and Youwei Tian. "Crescent-shaped spatial distribution: radiation properties concerning beam waist from the cross collision of a tightly focused laser pulse and a relativistic electron." Laser Physics 34, no. 6 (2024): 065401. http://dx.doi.org/10.1088/1555-6611/ad485d.

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Abstract The radiation properties of the cross collision between a single electron and an intense laser pulse are researched by numerical simulation methods. Under the condition of tightly-focused laser, the electron trajectories, spatiotemporal distribution and spectrum are compared with that under non-tightly focused lasers. The results show that the torsion effect on the electron during the oscillation process is more notable after the tightly focused laser interacts with electron. The radiation it generates is asymmetric in space, and its time distribution is nearly unimodal and can be reg

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Varró, S., and Gy Farkas. "Attosecond electron pulses from interference of above-threshold de Broglie waves." Laser and Particle Beams 26, no. 1 (2008): 9–20. http://dx.doi.org/10.1017/s0263034608000037.

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AbstractIt is shown that the above-threshold electron de Broglie waves, generated by an intense laser pulse at a metal surface are interfering to yield attosecond electron pulses. This interference of the de Broglie waves is an analog on of the superposition of high harmonics generated from rare gas atoms, resulting in trains of attosecond light pulses. Our model is based on the Floquet analysis of the inelastic electron scattering on the oscillating double-layer potential, generated by the incoming laser field of long duration at the metal surface. Owing to the inherent kinematic dispersion,

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Gallmann, Lukas. "The Nobel Prize in Physics 2023: The birth of attosecond science." SPG Mitteilungen - Communications de la SSP 72 (February 1, 2024): 13–17. https://doi.org/10.5281/zenodo.10676670.

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Beetar, John E., M. Nrisimhamurty, Tran-Chau Truong, et al. "Multioctave supercontinuum generation and frequency conversion based on rotational nonlinearity." Science Advances 6, no. 34 (2020): eabb5375. http://dx.doi.org/10.1126/sciadv.abb5375.

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The field of attosecond science was first enabled by nonlinear compression of intense laser pulses to a duration below two optical cycles. Twenty years later, creating such short pulses still requires state-of-the-art few-cycle laser amplifiers to most efficiently exploit “instantaneous” optical nonlinearities in noble gases for spectral broadening and parametric frequency conversion. Here, we show that nonlinear compression can be much more efficient when driven in molecular gases by pulses substantially longer than a few cycles because of enhanced optical nonlinearity associated with rotatio

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Luttmann, Martin, David Bresteau, and Thierry Ruchon. "Pump-Probe Delay Controlled by Laser-dressed Ionization with Isolated Attosecond Pulses." EPJ Web of Conferences 255 (2021): 13004. http://dx.doi.org/10.1051/epjconf/202125513004.

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In a recent work [1], we demonstrated how laser-dressed ionization can be harnessed to control with attosecond accuracy the time delay between an extreme-ultraviolet (XUV) attosecond pulse train and an infrared (IR) femtosecond pulse. In this case, the comb-like photoelectron spectrum obtained by ionizing a gas target with the two superimposed beams exhibits peaks oscillating with the delay. Two of them can be found to oscillate in phase quadrature, allowing an optimal measurement and stabilization of the delay over a large range. Here we expand this technique to isolated attosecond pulses, by

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Zhou, Chuliang, Ye Tian, Yushan Zeng, Zhinan Zeng, and Ruxin Li. "Bright High-Harmonic Generation through Coherent Synchrotron Emission Based on the Polarization Gating Scheme." Laser and Particle Beams 2022 (February 14, 2022): 1–10. http://dx.doi.org/10.1155/2022/6948110.

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Relativistic surface high harmonics, combined with the use of polarization gating, present a promising route towards intense single attosecond pulses. However, they impose stringent requirements on ultra-high laser contrast and are restricted by large intensity losses in real experiments. Here, we numerically demonstrate that by setting an optimal time delay in the polarization gating scheme, the intensity of the generated single attosecond pulses can become approximately 100 times stronger than that with nonoptimal time delay in the coherent synchrotron emission process. When a petawatt-class

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Wang, Xinyu, Yuanyuan Qiu, Yue Qiao, et al. "The Study on the Propagation of a Driving Laser Through Gas Target Using a Neural Network: Interaction of Intense Laser with Atoms." Symmetry 16, no. 12 (2024): 1670. https://doi.org/10.3390/sym16121670.

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High-order harmonic generation is one of the ways to generate attosecond ultra-short pulses. In order to accurately simulate the high-order harmonic emission, it is necessary to perform fast and accurate calculations on the interaction between the atoms and strong laser fields. The accurate profile of the laser field is obtained from the propagation through the gas target. Under the conditions of longer wavelength driving lasers and higher gas densities, the calculation of the laser field becomes more challenging. In this paper, we utilize the driving laser electric field information obtained

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Karmakar, A., and A. Pukhov. "Collimated attosecond GeV electron bunches from ionization of high-Z material by radially polarized ultra-relativistic laser pulses." Laser and Particle Beams 25, no. 3 (2007): 371–77. http://dx.doi.org/10.1017/s0263034607000249.

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Three dimensional Particle-in-Cell (3D-PIC) simulations of electron acceleration in vacuum with radially polarized ultra-intense laser beams have been performed. It is shown that single-cycle laser pulses efficiently accelerate a single attosecond electron bunch to GeV energies. When multi-cycle laser pulses are used, one has to employ ionization of high-Z materials to inject electrons in the accelerating phase at the laser pulse maximum. In this case, a train of highly collimated attosecond electron bunches with a quasi-monoenergetic spectra is produced. A comparison with electron acceleratio

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Bandrauk, André D., and Hong Shon Nguyen. "Attosecond molecular spectroscopy The one-electron H2+ system." Canadian Journal of Chemistry 82, no. 6 (2004): 831–36. http://dx.doi.org/10.1139/v04-080.

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Numerical solutions of the time-dependent Schrödinger equation for a 1-D model non-BornOppenheimer H2+ are used to illustrate the nonlinear, nonperturbative response of molecules to intense (I ≥ 1013 W/cm2), ultrashort (t < 10 fs) laser pulses. Molecular high-order harmonic generation (MHOHG) is shown to be an example of such response, and the resulting nonlinear photon emission spectrum is shown to lead to the synthesis of single attosecond (1018 s) pulses. Application of such ultrashort pulses to the H2+ system results in localized electron wave packets whose motion can be detected by a

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Ueda, Kiyoshi. "Science at X-ray Free Electron Lasers." Applied Sciences 11, no. 22 (2021): 10622. http://dx.doi.org/10.3390/app112210622.

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Liu, Jiansheng, Changquan Xia, Li Liu, Ruxin Li, and Zhizhan Xu. "Nonlinear Thomson backscattering of intense laser pulses by electrons trapped in plasma-vacuum boundary." Laser and Particle Beams 27, no. 3 (2009): 365–70. http://dx.doi.org/10.1017/s0263034609000287.

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AbstractWe present the idea of intensified attosecond X-ray generation based on nonlinear Thomson backscattering of an intense laser pulse by electrons trapped in plasma-vacuum boundary. Two frequency up-conversions due to the relativistic Doppler effect and longitudinal γ-spike effect are analyzed, respectively, where γ is the relativistic factor of the plasma surface. Relativistic resonance heating conditions should be used as a criterion for the experimental design to obtain efficient high-order harmonics and energetic electrons' generation at relatively low laser intensities. Shaping the l

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Hellemans, Alexander. "Attosecond lasers come of age." Physics World 17, no. 2 (2004): 10. http://dx.doi.org/10.1088/2058-7058/17/2/17.

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Shim, Chi Hyun, Ki Moon Nam, Yong Woon Parc, and Dong Eon Kim. "Isolated terawatt sub-attosecond high-energy x-ray pulse generated by an x-ray free-electron laser." APL Photonics 7, no. 5 (2022): 056105. http://dx.doi.org/10.1063/5.0067074.

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The endless quest for dynamics in natural phenomena has resulted in the generation and application of attosecond pulses to trace electron dynamics in atomic and molecular systems. The next challenge is to generate powerful pulses on the zeptosecond time scale, which is currently inaccessible. Through a simulation study, a new type of x-ray source that can generate an isolated terawatt sub-attosecond pulse at high-energy x rays by combining attosecond pulse technology with free-electron laser technology is proposed. The successful generation of a sub-attosecond pulse necessitates the considerat

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KIM, Kyung Taec. "Measurement of a Photoionization Delay Using Attosecond Pulses." Physics and High Technology 32, no. 12 (2023): 7–10. http://dx.doi.org/10.3938/phit.32.033.

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The Nobel Prize in Physics for 2023 was awarded to three distinguished scientists: Pierre Agostini, Ferenc Krausz, and Anne L’Huillier. This recognition honors their significant contributions in the field of experimental methods, specifically for generating attosecond pulses of light to study electron dynamics in matter. Anne L’Huillier and her research team made a groundbreaking discovery by utilizing a long-wavelength laser driver to achieve high harmonic generation. Pierre Agostini’s team accomplished the first-time measurement of the temporal profile of attosecond pulse trains, while Feren

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Berrah, Nora. "A perspective for investigating photo-induced molecular dynamics from within with femtosecond free electron lasers." Physical Chemistry Chemical Physics 19, no. 30 (2017): 19536–44. http://dx.doi.org/10.1039/c7cp01996c.

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Photo-induced molecular dynamics can now be investigated using free electron lasers (FELs) whose attributes are unprecedented brightness, few femtosecond pulses duration and in the near future few hundreds of attosecond pulse duration.

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Cho, Adrian, and Daniel Clery. "Sculptors of short light pulses win physics Nobel." Science 382, no. 6666 (2023): 23. http://dx.doi.org/10.1126/science.adl1812.

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