Article
Physics, Multidisciplinary
P. Kucharczyk, A. Golombek, M. Schleberger, A. Wucher, L. Breuer
Summary: This paper presents a time resolved experiment to investigate the ultrafast dynamics following an ion impact onto a solid surface. The experiment requires an ultrashort ion pump pulse in combination with a properly synchronized and time resolved probe. By using femtosecond laser photoionization of neon entrained in a pulsed supersonic jet, the study demonstrates the feasibility of producing ion pulses with high energies and picosecond duration.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Xiao-Ran Ma, Ya-Chao Li, Chao Ge, Peng Wang, Hai-Ying Song, Shi-Bing Liu
Summary: This study used the femtosecond two-color pump-probe optical reflectivity technique to investigate the coherent vibration dynamics in SnS0.91Se0.09 bulk single crystal. The oscillation signal in the time domain of SnS0.91Se0.09 was found to be an electron-phonon interaction. The coherent dynamics of longitudinal acoustic phonons in this coupling behavior is closely related to probe polarization and excitation power, and the stability of oscillation frequency reveals the microscopic mechanism of phonon conduction and lattice nonharmonicity caused by electron-phonon interaction in light-induced.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Maximilian Spellauge, Jan Winter, Stephan Rapp, Cormac McDonnell, Florian Sotier, Michael Schmidt, Heinz P. Huber
Summary: The ablation rate in double-pulse material processing is significantly affected by the pulse separation, with mechanisms such as rarefaction wave suppression, shielding by ablation plume, and material re-deposition playing important roles. The study found that the rarefaction wave contributes about 25% to the double-pulse ablation volume for aluminum and stainless steel, and about 40% for copper. Ablation efficiency and precision are maximized when energy is coupled into the material before mechanical relaxation or after material surface equilibration.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Fabian Mertens, David Moenkebuescher, Umut Parlak, Carla Boix-Constant, Samuel Manas-Valero, Margherita Matzer, Rajdeep Adhikari, Alberta Bonanni, Eugenio Coronado, Alexandra M. Kalashnikova, Davide Bossini, Mirko Cinchetti
Summary: Coherent THz optical lattice and hybridized phonon-magnon modes are induced by femtosecond laser pulses in an antiferromagnetic van der Waals semiconductor FePS3. The behavior of laser-driven lattice and spin dynamics is explored in a bulk crystal and a 380 nm-thick exfoliated flake under different conditions. The results reveal the connection between a coherent phonon mode and the long-range magnetic order, as well as the hybridization of a 3.2 THz phonon with a magnon mode in the presence of an external magnetic field.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Junxiao Yu, Haijuan Zhang, Zefang Lv, Conglong Chen, Runze Li, Xiaofang Zhai, Jie Chen, Peter M. Rentzepis
Summary: This study investigates the propagation of coherent longitudinal acoustic phonons (CLAPs) in crystal materials on thin-film interfaces and heterojunctions using ultrafast optical reflectivity and ultrafast x-ray diffraction measurements. The results show that acoustic impedance matching facilitates efficient propagation of CLAPs between different thin films and substrates, while impedance mismatch partially confines CLAPs within the film.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Kotaro Hiramatsu, Tatsuya Tajima, Keisuke Goda
Summary: Ultrafast coherent Raman spectroscopy is a highly sensitive spectroscopy method that allows the simultaneous acquisition of molecular structural information in two different wavelength ranges without the need for ultrashort pulses, opening up numerous opportunities in industrial, biomedical, and pharmaceutical applications.
Article
Optics
Yasser Fuentes-Edfuf, Mario Garcia-Lechuga, Javier Solis, Jan Siegel
Summary: Femtosecond laser machining is a mature high-precision technology with a wide range of applications. Understanding the complex laser-matter interaction processes is crucial for fully utilizing its potential. A study on steel material under single laser pulse irradiation reveals ultrafast electron heating followed by energy transfer to the lattice, leading to temperature changes from below melting threshold to above boiling point within a few picoseconds. Additionally, an innovative approach to obtain the evolving 3D structure of laser-excited materials is reported.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
G. Penco, G. Perosa, E. Allaria, L. Badano, F. Bencivenga, A. Brynes, C. Callegari, F. Capotondi, A. Caretta, P. Cinquegrana, S. Dal Zilio, M. B. Danailov, D. De Angelis, A. Demidovich, S. Di Mitri, L. Foglia, G. Gaio, A. Gessini, L. Giannessi, G. Kurdi, M. Manfredda, M. Malvestuto, C. Masciovecchio, R. Mincigrucci, I. Nikolov, E. Pedersoli, S. Pelli Cresi, E. Principi, P. Rebernik, A. Simoncig, S. Spampinati, C. Spezzani, F. Sottocorona, M. Trovo, M. Zangrando, V Chardonnet, M. Hennes, J. Luening, B. Vodungbo, P. Bougiatioti, C. David, B. Roesner, M. Sacchi, E. Roussel, E. Jal, G. De Ninno
Summary: The introduction of free-electron lasers (FELs) in the soft- and hard-x-ray spectral regions has revolutionized the study of electronic, magnetic, and structural dynamics with high time resolution. FELs have greatly enhanced the capabilities of several analytical techniques, particularly in the area of transverse coherence. This paper demonstrates the generation of highly longitudinally coherent pulses in the water window and beyond using the nonlinear harmonic regime of seeded FELs, and presents the results of two proof-of-principle experiments.
Article
Chemistry, Multidisciplinary
Yonghao Gu, Bing Gu, Shichao Sun, Haiwang Yong, Vladimir Y. Y. Chernyak, Shaul Mukamel
Summary: The process of charge migration in molecules during photoionization can be induced and enhanced by placing the molecule in an optical cavity, which can be monitored using time-resolved photoelectron spectroscopy. It is found that the charge migration process in a cavity is local and does not exhibit collective effects.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Optics
Daria Kolbasova, Maximilian Hartmann, Rui Jin, Alexander Blaettermann, Christian Ott, Sang-Kil Son, Thomas Pfeifer, Robin Santra
Summary: This study investigates the application of attosecond transient absorption spectroscopy in characterizing inner-shell-excited systems. The experimental setup involves preparing wave packets with an attosecond XUV pulse and probing them with a femtosecond NIR pulse to study coherent electron dynamics in core-excited xenon atoms. The theoretical analysis shows that the additional influence of an NIR dressing field on the transient absorption spectrum is substantial, highlighting the importance of precise characterization of the NIR pulse for qualitative and quantitative comparisons with experimental results.
Review
Chemistry, Physical
Gregor Zwaschka, Francois Lapointe, R. Kramer Campen, Yujin Tong
Summary: The core of electrochemistry lies in charge transfer, which requires probing dynamics on different time scales. While conventional detection schemes are suitable for slower processes, they lack sufficient time resolution for ultrafast processes. Recent studies using ultrashort lasers have explored ultrafast dynamics at the metal/solution interface, expanding our understanding of these processes.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Hui-Min Wang, Xin-Bao Liu, Shi-Qi Hu, Da-Qiang Chen, Qing Chen, Cui Zhang, Meng-Xue Guan, Sheng Meng
Summary: Laser-controlled coherent phonon excitation significantly enhances carrier mobility by accelerating polaron transport. Selective excitation of specific phonon modes that overlap with the polaronic lattice deformation can reduce the energy barrier for polaron hopping. Nonadiabatic couplings between the electronic and ionic subsystems promote polaron migration through phonon-phonon scattering.
Article
Optics
Yaxin Zhang, Kesen Ding, Hongxin Zeng, Wei Kou, Tianchi Zhou, Hongji Zhou, Sen Gong, Ting Zhang, Lan Wang, Shixiong Liang, Feng Lan, Yazhou Dong, Zhihong Feng, Yubin Gong, Ziqiang Yang, Daniel M. Mittleman
Summary: Terahertz (THz) technology has attracted much attention as a potential key component of future communication systems. However, the lack of effective high-speed direct modulation of THz waves has hindered the development of THz communication technology. Researchers have developed a guided-wave modulator for THz signals that performs on par with existing fiber-optic modulators. The modulator demonstrates high modulation depth, fast modulation speed, and low insertion loss, making it suitable for on-chip integrated high-performance THz devices.
Article
Multidisciplinary Sciences
Shruti Dogra, John J. McCord, Gheorghe Sorin Paraoanu
Summary: Researchers propose the concept of coherent interaction-free detection and demonstrate it experimentally using a superconducting transmon circuit. Compared to standard setups, this method employs a fully coherent evolution and achieves a higher probability of success. Experimental results show that it is possible to determine the presence of a microwave pulse resonant with the second transition of the transmon without exciting the device onto the third level.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Jiahua Cai, Sai Chen, Chunyan Geng, Jianghao Li, Baogang Quan, Xiaojun Wu
Summary: We investigate the nonlinear modulation dynamics of a THz-nano metasurface on silicon substrates using a time-resolved strong-field THz-pump THz-probe (TPTP) technique. The self-modulation phenomenon with a frequency shift of about 50 GHz is achieved by switching the THz field strength. This phenomenon is attributed to the impact ionization (IMI) of the silicon substrate under the excitation of strong THz fields in nano-gaps.
Article
Chemistry, Physical
Erik Kieft, Karl B. Schliep, Pranav K. Suri, David J. Flannigan
STRUCTURAL DYNAMICS-US
(2015)
Article
Chemistry, Physical
W. Verhoeven, J. F. M. van Rens, M. A. W. van Ninhuijs, W. F. Toonen, E. R. Kieft, P. H. A. Mutsaers, O. J. Luiten
STRUCTURAL DYNAMICS-US
(2016)
Article
Microscopy
J. F. M. van Rens, W. Verhoeven, J. G. H. Franssen, A. C. Lassise, X. F. D. Stragier, E. R. Kieft, P. H. A. Mutsaers, O. J. Luiten
Article
Physics, Applied
Erik Kieft, Eric Bosch
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2008)
Article
Physics, Applied
J. F. M. van Rens, W. Verhoeven, E. R. Kieft, P. H. A. Mutsaers, O. J. Luiten
APPLIED PHYSICS LETTERS
(2018)
Article
Microscopy
S. Meuret, M. Sola Garcia, T. Coenen, E. Kieft, H. Zeijlemaker, M. Latzel, S. Christiansen, S. Y. Woo, Y. H. Ra, Z. Mi, A. Polman
Article
Chemistry, Physical
I. G. C. Weppelman, R. J. Moerland, L. Zhang, E. Kieft, P. Kruit, J. P. Hoogenboom
STRUCTURAL DYNAMICS-US
(2019)
Article
Instruments & Instrumentation
W. Verhoeven, J. F. M. van Rens, A. H. Kemper, E. H. Rietman, H. A. van Doorn, I. Koole, E. R. Kieft, P. H. A. Mutsaers, O. J. Luiten
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Chemistry, Physical
W. Verhoeven, J. F. M. van Rens, W. F. Toonen, E. R. Kieft, P. H. A. Mutsaers, O. J. Luiten
STRUCTURAL DYNAMICS-US
(2018)
Article
Engineering, Electrical & Electronic
R Groenen, ER Kieft, JL Linden, MCM Van De Sanden
JOURNAL OF ELECTRONIC MATERIALS
(2006)
Article
Instruments & Instrumentation
ER Kieft, CHJM Groothuis, JJAM van der Mullen, V Banine
REVIEW OF SCIENTIFIC INSTRUMENTS
(2005)
Article
Physics, Applied
N de Vries, X Zhu, ER Kieft, J van der Mullen
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2005)
Article
Physics, Fluids & Plasmas
ER Kieft, K Garloff, JJAM van der Mullen, V Banine
Article
Physics, Fluids & Plasmas
ER Kieft, JJAM van der Mullen, GMW Kroesen, V Banine, KN Koshelev
Article
Microscopy
C. Gao, C. Hofer, T. J. Pennycook
Summary: Ptychography provides high dose efficiency images that can reveal light elements next to heavy atoms. However, contrast reversals can occur when the projected potential becomes strong. Recent research has shown that these reversals can be counteracted by adapting the focus. This study explains why the best contrast is often found with the probe focused to the middle of the sample and highlights the importance of convergence angle in thin samples to remove contrast reversals.
Article
Microscopy
J. Lindner, U. Ross, T. Meyer, V. Boureau, M. Seibt, Ch. Jooss
Summary: Phase-shifting electron holography is an excellent method with high phase sensitivity to reveal electron wave phase information. An advanced drift correction scheme is proposed in this study, which exploits the interface of the TEM specimen and the vacuum area in the hologram. This method allows for obtaining reliable phase information.
Article
Microscopy
Ali Jaberi, Nicolas Brodusch, Jun Song, Raynald Gauvin
Summary: This study investigates knock-on damage in lithium-ion batteries (LIBs) by computing threshold displacement energies (TDEs) and performing Monte Carlo simulation. The results indicate that Li is most sensitive to knock-on damage at moderate electron energies, and TDE is the principal parameter for assessing Li sensitivity to knock-on damage across similar structures.
Article
Microscopy
Alexander Schroeder, Christopher Rathje, Leon van Velzen, Maurits Kelder, Sascha Schaefer
Summary: This study utilizes novel event-based electron detector platforms to extend the temporal resolution of electron microscopy. By training a neural network to predict electron arrival time, the researchers were able to improve the timing accuracy and achieve a promising solution for enhancing electron timing precision in various electron microscopy applications.
Article
Microscopy
Avi Auslender, Nivedita Pandey, Amit Kohn, Oswaldo Dieguez
Summary: This article describes a faster implementation based on DFT for computing the mean inner potential of crystals, providing quantum-mechanical calculations beyond the independent-atom approximation. The study also reveals the dependence of the mean inner potential on sample boundary conditions, mass density, and magnetic susceptibility, highlighting its correlation with various material properties.
Article
Microscopy
Zhidong Yang, Dawei Zang, Hongjia Li, Zhao Zhang, Fa Zhang, Renmin Han
Summary: In this work, we propose a self-supervised deep learning model for cryo-ET volumetric image denoising based on noise modeling and sparsity guidance. Experimental results demonstrate that our method can achieve reliable denoising by training on single noisy volume and outperform existing methods.
Article
Microscopy
J. Kuttruff, J. Holder, Y. Meng, P. Baum
Summary: In this study, a robust clustering algorithm is proposed that can find clusters in a continuous stream of raw data in real time. This algorithm converts pixel hits measured by hybrid pixel detectors to real single-electron events. By continuously comparing with previous hits, the algorithm efficiently identifies the merging of new and old events.
Article
Microscopy
D. G. Senturk, C. P. Yu, A. De Backer, S. Van Aert
Summary: This article presents a statistics-based method for accurately counting the number of atoms in nanostructures, especially for images acquired with low electron doses and multiple element structures.
Article
Microscopy
Mauricio J. Prieto, Lucas de Souza Caldas, Liviu C. Tanase, Thomas Schmidt, Oscar Rodriguez de la Fuente
Summary: This study presents a synchrotron-based investigation of the synthesis process of a magnetite/hematite bilayer. Ion bombardment gradually transforms hematite into magnetite, and the growth of magnetite leads to the formation of stable boundaries. These findings are significant for understanding novel oxide heterostructures.
Article
Microscopy
Emre Yoruk, Holger Klein, Stephanie Kodjikian
Summary: Beam sensitive nanomaterials pose challenges for crystallographic structure determination. A dose symmetric electron diffraction tomography (DS-EDT) method is developed to reduce beam damage and obtain complete data sets by merging individual datasets from multiple crystals.
Article
Microscopy
A. Pofelski, Y. Zhu, G. A. Botton
Summary: The precision and sensitivity of the GPA method for strain characterization is a widely discussed topic. This study introduces the concept of phase noise and analyzes the parameter of sampling to improve the precision of GPA. Experimental and theoretical results demonstrate that using a larger pixel spacing in STEM can enhance the precision and sensitivity of the GPA method.
Article
Microscopy
Sangjun Kang, Di Wang, Christian Kuebel, Xiaoke Mu
Summary: Transmission electron microscopy is a valuable tool for assessing strain fields within materials. However, using thin specimens in TEM analysis can affect atomic configuration and deformation structure.