Article
Physics, Multidisciplinary
Yipeng Wu, Jianfei Hua, Zheng Zhou, Jie Zhang, Shuang Liu, Bo Peng, Yu Fang, Xiaonan Ning, Zan Nie, Fei Li, Chaojie Zhang, Chih-Hao Pai, Yingchao Du, Wei Lu, Warren B. Mori, Chan Joshi
Summary: Plasma-based accelerators driven by intense lasers or charged particle beams can accelerate electrons or positrons with high gradients, but require stability, quality, controllable polarization, and reproducibility. External injection from a conventional linear accelerator into a laser wakefield accelerator and subsequent acceleration without significant charge loss has been demonstrated. Proper shaping and matching of the beam into the plasma structure can achieve this with modest degradation in beam quality, paving the way for a high-energy, hybrid conventional-plasma-based accelerator.
Article
Engineering, Electrical & Electronic
Michael I. Yalandin, Leonid N. Lobanov, Elizaveta A. Osipenko, Konstantin A. Sharypov, Valery G. Shpak, Sergey A. Shunailov, Naum S. Ginzburg, Irina V. Zotova
Summary: This article presents the development of a collector sensor with the fastest response to-date for time-domain diagnostics of subrelativistic electron bunches. The simulation data show that the signal transformation is influenced by the mismatch between the collector unit and the transmitting duct of the sensor. The study also discusses the features of diagnosing bunch sequences using the proposed sensor.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Physics, Fluids & Plasmas
S. Marini, P. S. Kleij, F. Pisani, F. Amiranoff, M. Grech, A. Macchi, M. Raynaud, C. Riconda
Summary: Using ultra-high intensity laser pulses with wave-front rotation to produce short, ultra-intense surface plasma waves on grating targets can accelerate electron bunches with high charge, high energy, and ultra-short duration. By optimizing the grating design and WFR conditions, we can achieve efficient electron acceleration in the relativistic regime.
Article
Materials Science, Multidisciplinary
S. Reale, A. Singha, S. L. Ahmed, D. Krylov, L. Colazzo, C. Wolf, C. S. Casari, A. Barla, E. Fernandes, F. Patthey, M. Pivetta, S. Rusponi, H. Brune, F. Donati
Summary: This study explores the use of lanthanide atoms adsorbed on surfaces as a platform for atomic-scale magnetic information storage. The authors propose a combined experimental and theoretical method to evaluate the performance of these atoms for quantum coherent operations. Using X-ray absorption spectroscopy and scanning tunneling microscopy, they investigate the magnetic and electronic properties of Er and Tm on MgO(100)/Ag(100) and identify their adsorption sites. They suggest that these atoms could be used for electron spin resonance scanning tunneling microscopy and possess a nontrivial nuclear spin that could be exploited for two-qubit operations or quantum state storage.
Article
Physics, Multidisciplinary
Laura Di Lucchio, Paul Gibbon
Summary: This paper determines the energy gain of attosecond electron bunches emitted during the interaction of intense, few-cycle linearly polarized lasers with nanoscale spherical clusters. An analytical model for focused light waves interacting with compact, overdense electron bunches in vacuum is derived, and compared with three-dimensional PIC simulations to determine the effective increase in bunch energy under realistic conditions.
Article
Physics, Applied
Nicolas Vitrant, Sebastien Garcia, Kilian Muller, Alexei Ourjoumtsev
Summary: The ultracompact high-resolution imaging system for cold atoms developed can image cold Rb atoms with approximately 1-mu m resolution over a 100 x 100 mu m(2) field of view. It utilizes an in-vacuum multimode optical fiber and external adaptive optics, allowing for easy rearrangement between absorption and fluorescence imaging modes. This system is ideal for hybrid quantum-engineering platforms where optical access is restricted.
PHYSICAL REVIEW APPLIED
(2021)
Article
Materials Science, Multidisciplinary
Chaofan Xiao, Zhiyi Xu, Haiyang Lu, Jiaxin Liu, Chengzhi Xie, Yanying Zhao, Yixing Geng, Shiyou Chen, Chia Er Chen, Xueqing Yan
Summary: Direct imaging with 100 MeV electrons using a 200 TW laser facility in Peking University shows superiority in thick material imaging applications. It is anticipated that this technology can be used for ultrafast dynamic analysis with higher charge electrons in a single ultrafast bunch from laser-driven electron accelerators.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Physics, Multidisciplinary
Wayne Cheng-Wei Huang, Herman Batelaan, Markus Arndt
Summary: The article discusses the selective excitation of harmonic oscillators using interference in a bichromatic laser field, as well as the technique for building a large-momentum-transfer beam splitter. This method can transform the harmonic oscillator into a coherent two-level system and has the potential for experimental verification over a wide range of mass scales.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Carlos M. Bustamante, Esteban D. Gadea, Tchavdar N. Todorov, Damian A. Scherlis
Summary: Cooperative optical effects can amplify or suppress photon emission, offering a wide range of possibilities for photon technologies. Ab initio quantum dynamics simulations provide insights into the impact of molecular structure and pulse modulation on optical energy manipulation, aiding in the design of superradiant and subradiant devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
I. Iparraguirre, S. Garcia-Revilla, J. Azkargorta, J. Fernandez, R. Balda
Summary: In recent research, the authors investigated the spectro-temporal properties of random laser emission from solid state dye-doped powders. They found that each emission pulse consisted of narrow peaks with a spectro-temporal width close to the theoretical limit. This behavior could be explained by the distribution of path lengths traveled inside the diffusive active medium by photons that could be amplified by stimulated emission. The aim of the study was to develop an implemented model that does not depend on fitting parameters and to gain knowledge about the spatial properties of the emission.
Article
Physics, Multidisciplinary
Marek Gluza, Jens Eisert
Summary: Researchers have proposed a new method to measure local coherent currents by altering densities in response to quenches to noninteracting dynamics after tilting the optical lattice. They have successfully established a data analysis method to solve the closed set of equations and reliably recover the full covariance matrix of coherent currents.
PHYSICAL REVIEW LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Yicong Chen, Jun Chen, Zhibing Li
Summary: This article reviews the recent progress on cold cathodes with graphene as the direction, including both experimental and theoretical studies. The review emphasizes the phenomena that are absent in conventional cold cathodes but present in two-dimensional van der Waals materials, such as directionality and coherence. It also covers the fabrication of emitter structures for field emission applications, their field emission properties, and the existing field emission model.
Article
Multidisciplinary Sciences
Yan Liu, Rui Wang, Zhigang Wang, Da Li, Tian Cui
Summary: In this study, the authors report the prediction of a nitrogen-rich iodine nitride compound (IN6) with an unusual twelve-fold coordination of the iodine atom under high pressure. They discovered the existence of a hypercoordinated IN6 compound composed of N-6 rings and an unusual iodine-nitrogen covalent bond network using particle swarm optimization method and first-principles calculations. The formation of twelve-fold iodine hypercoordination is facilitated by the presence of high pressure and N-6 rings. The findings also suggest that halogen elements with lower atomic numbers have weaker valence expansion propensity in halogen nitrides.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Rudolf Haindl, Kerim Koester, John H. Gaida, Maximilian Franz, Armin Feist, Claus Ropers
Summary: We demonstrate photoassisted cold field emission (PFE) from a tungsten tip induced by tunable-wavelength low-power femtosecond laser excitation. The emission current from the apex of the (310)-oriented single-crystalline emitter is shown to linearly depend on the incident laser power, while the effective work function is reduced by the respective photon energy. Our results promote the implementation of the linear regime in laser-triggered cold field emission for ultrafast transmission electron microscopy.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Food Science & Technology
Anna R. Ziefuss, Tim Hupfeld, Sven W. Meckelmann, Martin Meyer, Oliver J. Schmitz, Wiebke Kaziur-Cegla, Lucie K. Tintrop, Torsten C. Schmidt, Bilal Gokce, Stephan Barcikowski
Summary: This study introduces a method of preparing cold-brewed coffee using an ultrashort-pulsed laser system. By applying the laser system to the suspension of coffee powder without heating, caffeine and aromatic substances can be efficiently extracted within a few minutes. The resulting cold-brewed coffee has a similar composition and taste to traditional cold-brewed coffee, with more volatile substances preserved.
NPJ SCIENCE OF FOOD
(2022)
Article
Optics
Rory W. Speirs, Corey T. Putkunz, Andrew J. McCulloch, Keith A. Nugent, Benjamin M. Sparkes, Robert E. Scholten
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2015)
Article
Optics
Andrew J. McCulloch, Ben M. Sparkes, Robert E. Scholten
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2016)
Article
Optics
Joshua S. Torrance, Ben M. Sparkes, Lincoln D. Turner, Robert E. Scholten
Article
Physics, Multidisciplinary
D. J. Thompson, D. Murphy, R. W. Speirs, R. M. W. van Bijnen, A. J. McCulloch, R. E. Scholten, B. M. Sparkes
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
A. A. Wood, E. Lilette, Y. Y. Fein, V. S. Perunicic, L. C. L. Hollenberg, R. E. Scholten, A. M. Martin
Article
Physics, Nuclear
Joshua S. Torrance, Rory W. Speirs, Andrew J. McCulloch, Robert E. Scholten
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2018)
Article
Multidisciplinary Sciences
Alexander A. Wood, Emmanuel Lilette, Yaakov Y. Fein, Nikolas Tomek, Liam P. McGuinness, Lloyd C. L. Hollenberg, Robert E. Scholten, Andy M. Martin
Article
Multidisciplinary Sciences
David A. Simpson, Jean-Philippe Tetienne, Julia M. McCoey, Kumaravelu Ganesan, Liam T. Hall, Steven Petrou, Robert E. Scholten, Lloyd C. L. Hollenberg
SCIENTIFIC REPORTS
(2016)
Article
Physics, Multidisciplinary
A. A. Wood, L. C. L. Hollenberg, R. E. Scholten, A. M. Martin
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
A. A. Wood, R. M. Goldblatt, R. E. Scholten, A. M. Martin
Summary: This study demonstrates the optical nuclear-spin polarization and rapid quantum control of nuclear spins in diamond, showing the ability to measure and control nuclear spins without strict field alignment. The work unlocks previously inaccessible degrees of freedom of the NV nuclear spin, providing new approaches to quantum control and rotation sensing.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
A. J. McCulloch, R. W. Speirs, S. H. Wissenberg, R. P. M. Tielen, B. M. Sparkes, R. E. Scholten
Article
Optics
A. J. McCulloch, R. W. Speirs, J. Grimmel, B. M. Sparkes, D. Comparat, R. E. Scholten
Article
Optics
Rory W. Speirs, Andrew J. McCulloch, Ben M. Sparkes, Robert E. Scholten
Article
Optics
B. M. Sparkes, D. Murphy, R. J. Taylor, R. W. Speirs, A. J. McCulloch, R. E. Scholten
Article
Materials Science, Multidisciplinary
A. A. Wood, A. G. Aeppli, E. Lilette, Y. Y. Fein, A. Stacey, L. C. L. Hollenberg, R. E. Scholten, A. M. Martin