Article
Optics
O. Hort, A. Dubrouil, M. A. Khokhlova, D. Descamps, S. Petit, F. Burgy, E. Mevel, E. Constant, V. V. Strelkov
Summary: A new regime of coherent XUV emission has been observed, showing potential for higher XUV intensity crucial for applications. The study explains the process of high-order parametric generation, involving the combined emission of THz and XUV photons with robust phase matching against ionization. This provides a way to use higher-energy driving pulses for generating more XUV photons.
Article
Computer Science, Information Systems
Xuan Li, Shanghong Zhao, Guodong Wang, Yixiao Zhou
Summary: A method of photonically generating a bandwidth multiplied linear chirped signal with phase modulation capability is proposed, with demonstrated applications in communication and radar systems. The generator combines bandwidth multiplication and phase modulation, and can be used for wireless communication and radar detection, with verified signal generation and application performance through simulation.
Article
Optics
Mikhail Martyanov, Anatoly Poteomkin, Igor Kuzmin, Sergey Mironov
Summary: In this study, modulation of chirped laser pulse intensity using phase-only spectral modulation was achieved. The preservation of this modulation during second harmonic generation was demonstrated, together with a conversion efficiency of almost 30%, by employing noncollinear frequency mixing of oppositely chirped laser pulses with an energy of 60 μJ.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Richard Hollinger, Paul Herrmann, Viacheslav Korolev, Maximilian Zapf, Valentina Shumakova, Robert Roeder, Ingo Uschmann, Audrius Pugzlys, Andrius Baltuska, Michael Zurch, Carsten Ronning, Christian Spielmann, Daniil Kartashov
Summary: This work experimentally investigates photoluminescence and high-order harmonic generation in ZnO materials under intense femtosecond mid-IR laser pulse irradiation. The ellipticity dependence on the generation of high order harmonics is studied, providing an efficient method to distinguish the dominant HHG mechanism for different harmonic orders. Interband Zener tunneling shows a significant excitation efficiency drop for circularly polarized strong-field pump pulses.
Article
Optics
Lihong Hong, Chenyang Hu, Yuanyuan Liu, Huijun He, Liqiang Liu, Zhiyi Wei, Zhi-Yuan Li
Summary: In this study, a high-efficiency supercontinuum white laser with large bandwidth and high pulse energy was generated using a single nonlinear crystal. By exploiting the synergistic effects of high-harmonic generation and self-phase modulation, a 2.8-octave-spanning UV-Vis-IR supercontinuum white laser was achieved. This breakthrough has significant implications for various applications in basic science and high technology.
Article
Chemistry, Physical
Hicham Agueny
Summary: The study demonstrates the importance of metal surfaces for generating coherent isolated attosecond XUV and soft-x-ray pulses and for designing compact solid-state HHG devices. By exploring surface states in transition-metal surfaces and using optimal chirped pulses, quantum modulations in the XUV region can be enhanced effectively.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Optics
Evgeny A. Perevezentsev, Malte Per Siems, Daniel Richter, Ivan B. Mukhin, Ria G. Kraemer, Anton I. Gorokhov, Mikhail R. Volkov, Stefan Nolte
Summary: The first steps towards developing and characterizing next-generation chirped volume Bragg gratings (CVBGs) using fs laser inscription were taken. CVBGs with a 3 x 3 mm2 aperture and a length of almost 12 mm were successfully created on fused silica. Despite the polarization and phase distortions caused by mechanical stresses, a possible solution to this problem was proposed. The small change in the linear absorption coefficient of fused silica allows for the utilization of these gratings in high average power lasers.
Article
Physics, Applied
Yabei Su, Shaobo Fang, Shuai Wang, Yueying Liang, Guoqing Chang, Xinkui He, Zhiyi Wei
Summary: This study demonstrates the synthesis of ultra-short, near-single-cycle pulses through delay-controlled two-color, few-cycle pulses. The method of delay-controlled high-harmonic generation is experimentally demonstrated, leading to a twofold enhancement of high-order harmonic yields and extension of harmonic frequency. This approach offers a way to manipulate multi-color pulses for controlling ionization dynamics in extreme nonlinear optics.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
H. Huang, X. Xiao, M. Burger, J. Nees, I Jovanovic
Summary: A broadband light source based on near-infrared chirped-pulse difference-frequency mixing is introduced, which is suitable for seeding LWIR optical parametric chirped-pulse amplification (OPCPA). LWIR pulses with expanded bandwidth are generated by mixing transform-limited pulses and assisted by genetic algorithm optimization.
Article
Optics
Jan Tross, Shashank Pathak, Adam Summers, Dimitrios Rompotis, Benjamin Erk, Christopher Passow, Bastian Manschwetus, Rebecca Boll, Patrik Grychtol, Sadia Bari, Vinod Kumarappan, Anh-Thu Le, Cheng Jin, Carlos Trallero, Daniel Rolles
Summary: We present the results of an experiment investigating the generation of high-order harmonics through XUV-assisted high-order harmonic generation. Our findings demonstrate that the overlap of XUV and NIR pulses enhances the harmonic yield, while the XUV preceding the NIR pulse decreases the HHG yield.
Article
Optics
Srinivasa Rao Konda, Yu Hang Lai, Wei Li
Summary: The study explores high-order harmonics generation using silver plasma plumes ablated by fs laser pulses, showing enhanced intensity and cut-off with shorter pulse duration. Experimentally, the cut-off frequencies for Ag+ and Ag2+ ions closely match theoretical values. Chirped fs driving pulses result in blueshift and redshift of harmonic spectra, increasing intensity of specific harmonic ranges. Comparing bulk and nanoparticles, smaller NPs demonstrate greater HHG efficiency.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Shuai Wang, Jiawei Guo, Xinkui He, Yueying Liang, Baichuan Xie, Shiyang Zhong, Hao Teng, Zhiyi Wei
Summary: By comparing the high harmonic spectra of solids generated by laser pulses with varying durations, we found that lasers with good dispersion compensation can produce a broad spectrum of high harmonics. As the pulse duration is further compressed, several interference peaks appear in the broad spectrum. Moreover, simulations using the semiconductor Bloch equation, considering the effect of Berry curvature, were conducted to better understand this process. Our work provides a valuable approach for studying HHG by few-cycle laser pulses in solid materials, expanding the application of HHG in attosecond physics.
Review
Optics
Eleftherios Goulielmakis, Thomas Brabec
Summary: When solids are exposed to intense laser fields, nonlinear optics occurs and high-order harmonics are emitted from the bulk of materials. The study of this phenomenon has offered new possibilities for probing the electronic structure of solids and has led to advances in solid-state photonics. This review summarizes recent experimental and theoretical progress in this field and discusses potential future directions and applications.
Article
Optics
N. J. Strandquist Jr, J. M. Ngoko Djiokap
Summary: A class of linear, spiral phenomena is discovered in the photoelectron momentum distribution when studying photoionization of S-state atoms by a pair of linearly chirped, oppositely circularly polarized attosecond pulses eventually delayed in time by tau. This controllable effect, dubbed reversible electron spirals because of its energy-dependent sense of rotation, is identified and can be isolated in the absence of time delay for the case of opposite chirp rates. The astrophysical concept of spiral arm pitch angle is borrowed to gain a better insight into the energy dependence of the reversible spiral rotation, to determine the attochirp as well as the binding energy characteristic of an atomic target. Our results indicate potential applications in attochirpmetry and polarimetry.
Article
Physics, Multidisciplinary
Tamas Csizmadia, Lenard Gulyas Oldal, Peng Ye, Szilard Majorosi, Paraskevas Tzallas, Giuseppe Sansone, Valer Tosa, Katalin Varju, Balazs Major, Subhendu Kahaly
Summary: The study focuses on electron quantum path interference effects during high harmonic generation in atomic gas medium driven by ultrashort chirped laser pulses. By varying experimentally relevant parameters of the driving laser pulse, the research aims to reveal the microscopic background behind interference patterns capturing important information about the laser field and generation process. The results provide guidance for experiments with chirp control to unravel and utilize the rich and complex interplay between interference effects.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Luis Roso, Roberto Lera, Smrithan Ravichandran, Andrew Longman, Calvin Z. He, Jose Antonio Perez-Hernandez, Jon Apinaniz, Lucas D. Smith, Robert Fedosejevs, Wendell T. Hill
Summary: This paper demonstrates the feasibility of photon-photon collision experiments using extreme lasers to obtain fundamental information about the essence of QED lagrangian. A possible scenario with two counterpropagating ultra-intense lasers for detecting photon scattering is analyzed. The importance of pulse widths, waist, overlapping of beams, and signal detection is discussed, along with methods to distinguish the signal from noise. The research concludes that such experiments are highly promising at 10(24) W cm(-2) and barely feasible at 10(23) W cm(-2).
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
P. Puyuelo-Valdes, D. de Luis, J. Hernandez, J. Apinaniz, A. Curcio, J. L. Henares, M. Huault, J. A. Perez-Hernandez, L. Roso, G. Gatti, L. Volpe
Summary: Fluid targets, such as liquid targets, are attractive for high-repetition-rate laser-driven ion acceleration due to their ability to regenerate in situ, produce minimal debris, and operate at a high repetition rate. In this study, high-repetition-rate MeV-range proton acceleration was achieved by the interaction of the VEGA-2 laser system with a micrometer-thick water sheet target in a high vacuum environment. The water target was able to continuously operate for 4 hours at a pressure of 10(-4) mbar, and more than 1000 shots were performed. Comparative analysis with existing literature and scaling laws was conducted, and a continuous proton distribution with energies up to 3.5 MeV was measured.
PLASMA PHYSICS AND CONTROLLED FUSION
(2022)
Article
Optics
Enrique G. Neyra, Gustavo A. Torchia, Pablo Vaveliuk, Fabian Videla
Summary: This study introduces an interferometric method to generate ultra-short pulses below the Fourier limit, showing promising results in experimental validation. The system is capable of reducing the pulse width, demonstrating potential applications in coherent control system design.
Article
Chemistry, Analytical
Carlos Salgado-Lopez, Jon Imanol Apinaniz, Jose Luis Henares, Jose Antonio Perez-Hernandez, Diego de Luis, Luca Volpe, Giancarlo Gatti
Summary: This study presents an angle-resolved Thomson parabola spectrometer for laser-accelerated ion beams, capable of distinguishing between different ionic species based on charge-to-mass ratio. The spectrometer offers high repetition rate compatibility and adjustable angular resolving power, enhancing flexibility and capabilities of ion detection through magnetic field characterization and trajectory calculation.
Article
Multidisciplinary Sciences
S. Malko, W. Cayzac, V. Ospina-Bohorquez, K. Bhutwala, M. Bailly-Grandvaux, C. McGuffey, R. Fedosejevs, X. Vaisseau, An. Tauschwitz, J. I. Apinaniz, D. De Luis Blanco, G. Gatti, M. Huault, J. A. Perez Hernandez, S. X. Hu, A. J. White, L. A. Collins, K. Nichols, P. Neumayer, G. Faussurier, J. Vorberger, G. Prestopino, C. Verona, J. J. Santos, D. Batani, F. N. Beg, L. Roso, L. Volpe
Summary: Ion stopping in warm dense matter is a process of fundamental importance but difficult to describe theoretically and measure experimentally. This study investigates proton energy-loss in warm dense plasma and finds a significant deviation from classical models. The results are in closest agreement with recent first-principles simulations based on time-dependent density functional theory.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Km Akanksha Dubey, Marcelo F. Ciappina
Summary: In this study, low energy electron scattering processes with cage, bowl, and ring isomers of C-20 were investigated using the Dirac partial wave analysis. The effects of the different isomers on the scattering observables were observed, with the ring isomer showing the highest resonant and non-resonant collision contribution.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Mathematics
Shidong Yang, Xiwang Liu, Jinyan Lin, Ruixin Zuo, Xiaohong Song, Marcelo Ciappina, Weifeng Yang
Summary: Researchers have successfully reconstructed the band structure of semiconductors by combining all-optical methods and deep learning techniques, providing an innovative approach for studying the structural properties of new materials.
Article
Physics, Multidisciplinary
Tomasz Szoldra, Marcelo F. Ciappina, Nicholas Werby, Philip H. Bucksbaum, Maciej Lewenstein, Jakub Zakrzewski, Andrew S. Maxwell
Summary: Deep learning models, particularly convolutional neural networks (CNNs), have shown great interpretability for image-like data. In this study, CNNs were tested on strong-field ionization photoelectron spectra to 'invert' experimental data and extract reliable laser intensity uncertainties. The study also highlights the importance of data augmentation techniques and accounting for detector saturation in training the models.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
U. Bhattacharya, Th Lamprou, A. S. Maxwell, A. Ordonez, E. Pisanty, J. Rivera-Dean, P. Stammer, M. F. Ciappina, M. Lewenstein, P. Tzallas
Summary: Strong laser field physics and quantum optics have been recently connected. Studies have shown that intense laser-matter interactions can generate controllable entangled and non-classical light states, opening up new research areas in these fields.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Optics
R. Della Picca, J. M. Randazzo, S. D. Lopez, M. F. Ciappina, D. G. Arbo
Summary: We present a theoretical study of atomic laser-assisted photoionization emission beyond the dipole approximation. We find that our non-dipole approach not only exhibits asymmetric emission in the direction of light propagation, but also allows emission in dipole-forbidden directions. Our theoretical scheme, presented here for He atoms in the 1s quantum state, is general enough to be applied to other atomic species and field configurations.
Article
Optics
Yongkun Chen, Yueming Zhou, Min Li, Kunlong Liu, Marcelo F. Ciappina, Peixiang Lu
Summary: Optical vortices are electromagnetic waves with a helical-like wavefront and carry orbital angular momentum (OAM). In this paper, we study electron dynamics driven by a spatiotemporal optical vortex (STOV), which carries transverse OAM. By designing a streaking-like technique, we characterize the OAM of the STOV and accurately retrieve it using quantum mechanical and semiclassical models. Our approach contributes to a better understanding of the interaction between complex spatiotemporal light fields and atomic targets.
Article
Physics, Multidisciplinary
Yasunobu Arikawa, Alessio Morace, Yuki Abe, Natsumi Iwata, Yasuhiko Sentoku, Akifumi Yogo, Kazuki Matsuo, Mitsuo Nakai, Hideo Nagatomo, Kunioki Mima, Hiroaki Nishimura, Shinsuke Fujioka, Ryosuke Kodama, Shunsuke Inoue, Masaki Hashida, Shuji Sakabe, Diego De Luis, Giancarlo Gatti, Marine Huault, Jose Antonio Perez-Hernandez, Luis Roso, Luca Volpe
Summary: For high repetition ultrahigh-intensity laser systems, automatic alignment of structured targets is crucial for consistent particle acceleration and plasma heating. This study demonstrates efficient electron acceleration using a high repetition rate, 30-fs ultrahigh-intensity laser system. By using two sequential laser pulses, a well-controlled and reproducible cylindrical crater is created on a flat stainless-steel target surface. The second pulse efficiently accelerates electrons inside the crater without the need for realignment, greatly increasing the laser absorption efficiency from 32.5% to 97.5%.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Quantum Science & Technology
Philipp Stammer, Javier Rivera-Dean, Andrew Maxwell, Theocharis Lamprou, Andres Ordonez, Marcelo F. Ciappina, Paraskevas Tzallas, Maciej Lewenstein
Summary: Intense laser-matter interactions are of great interest in research and technology, playing important roles in atomic, molecular, and optical physics, as well as attosecond physics and ultrafast optoelectronics. Recent investigations have shown that these interactions can generate controllable high-photon-number entangled coherent states and coherent state superpositions. This tutorial provides a comprehensive fully quantized description of intense laser-atom interactions, covering processes such as high-harmonic generation and above-threshold ionization. It also discusses new phenomena that cannot be explained by semiclassical theories and explores the potential for quantum state engineering of light.
Article
Optics
Enrique G. Neyra, Fabian Videla, Demian A. Biasetti, Marcelo F. Ciappina, Lorena Rebon
Summary: This work proposes a method to twist attosecond pulse trains by nonlinearly driving an atomic system with a laser source. It achieves control over the modulation of the linear polarization state between consecutive ultrashort bursts of extreme ultraviolet (XUV) radiation. Quantum-mechanical simulations and signal processing tools are used to analyze the underlying physics of the generation process.
Article
Optics
J. Rivera-Dean, P. Stammer, A. S. Maxwell, Th. Lamprou, P. Tzallas, M. Lewenstein, M. F. Ciappina
Summary: Light-matter entanglement is investigated in the above-threshold ionization process, and its impact on the quantum optical state of the system is studied theoretically. Hybrid entanglement states are created by considering the dependence on the kinetic energy and direction.
