Article
Optics
Yanming Zhang, Yusuke Ito, Huijie Sun, Naohiko Sugita
Summary: A pump-probe imaging method was developed to directly observe and evaluate the processing phenomena during femtosecond laser machining of zirconia ceramics. The method allowed for clear imaging and investigation of electron excitation, shockwave propagation, plasma evolution, and hole formation occurring on various timescales.
Article
Materials Science, Multidisciplinary
Jiannan Deng, Hongxia Qi, Xinyi Liu, Xiaoyi Li, Qiunan Tong, Zhenzhong Lian, Juan Li, Jinqiu Bo, Dehou Fei, Zhou Chen, Zhan Hu
Summary: The ablation processes of Cu film using femtosecond pulse trains were studied, showing that electron multiple heating and plasma shielding mechanisms dominate at different sub-pulse intervals. Additionally, significant oscillations in depth were observed under low fluence conditions using three pulse trains.
CURRENT APPLIED PHYSICS
(2021)
Article
Green & Sustainable Science & Technology
Hyeon-Min Lee, Jung-Hyun Choi, Seung-Jae Moon
Summary: In this study, the machining characteristics of glass substrates containing chemical components were investigated for femtosecond laser helical drilling. The research found that the drilling conditions for each glass substrate were affected by its chemical components, particularly the percentage of Al(2)O(3) and MgO components. Increasing the percentage of Al(2)O(3) and MgO components in the glass substrates resulted in a decrease in ablation threshold energy and greater vertical speed of the laser head.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Optics
Kaibo Xia, Naifei Ren, Qing Lin, Tao Li, Fuqiang Gao, Huayu Yang, Shiwen Song
Summary: The experimental investigation showed that transverse magnetic assistance improved both the quality and efficiency of femtosecond laser through-hole drilling. The magnetic field changed plasma distribution, reduced plasma density, and weakened the plasma's shielding effect, resulting in better drilling outcomes.
Article
Engineering, Multidisciplinary
Yaqing Qiao, Tianting Chen, Haoran Ma, Yi Liu, Aiguo Tang, Wei Xiong, Leimin Deng
Summary: This study investigated the effect of laser angle-of-incidence on the sidewall quality of femtosecond laser drilling CFRP. The results showed that increasing the laser AOI could prevent laser blockage, enhance laser processing efficiency, but also lead to cavities and crevices caused by resin loss. By adjusting the drilling strategy and laser energy, the sidewall quality could be improved.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Susannah Holmes, Henry J. Kirkwood, Richard Bean, Klaus Giewekemeyer, Andrew Martin, Marjan Hadian-Jazi, Max O. Wiedorn, Dominik Oberthuer, Hugh Marman, Luigi Adriano, Nasser Al-Qudami, Sasa Bajt, Imrich Barak, Sadia Bari, Johan Bielecki, Sandor Brockhauser, Mathew A. Coleman, Francisco Cruz-Mazo, Cyril Danilevski, Katerina Doerner, Alfonso M. Ganan-Calvo, Rita Graceffa, Hans Fanghor, Michael Heymann, Matthias Frank, Alexander Kaukher, Yoonhee Kim, Bostjan Kobe, Juraj Knoska, Torsten Laurus, Romain Letrun, Luis Maia, Marc Messerschmidt, Markus Metz, Thomas Michelat, Grant Mills, Serguei Molodtsov, Diana C. F. Monteiro, Andrew J. Morgan, Astrid Muennich, Gisel E. Pena Murillo, Gianpietro Previtali, Adam Round, Tokushi Sato, Robin Schubert, Joachim Schulz, Megan Shelby, Carolin Seuring, Jonas A. Sellberg, Marcin Sikorski, Alessandro Silenzi, Stephan Stern, Jola Sztuk-Dambietz, Janusz Szuba, Martin Trebbin, Patrick Vagovic, Thomas Ve, Britta Weinhausen, Krzysztof Wrona, Paul Lourdu Xavier, Chen Xu, Oleksandr Yefanov, Keith A. Nugent, Henry N. Chapman, Adrian P. Mancuso, Anton Barty, Brian Abbey, Connie Darmanin
Summary: The European XFEL MHz SFX technique enables tracking of sub-microsecond structural changes in individual crystals, allowing for multi-hit serial crystallography. This technique overcomes the issue of radiation damage in traditional methods.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Masafumi Koga, Yuto Miyake, Mizuki Hayasaka, Hikaru Sotome, Hiroshi Miyasaka
Summary: The photoionization dynamics of N,N-dimethylaniline (DMA) from highly electronically excited states in ethanol solution were studied using femtosecond two-pulse two-photon excitation transient absorption (2PE-TA) spectroscopy. The ionization occurred via a rapid channel and a slow one, with the slow ionization regulated by the formation of anionic species just before the completion of the solvation of the electron.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Morgane Vacher, Alexie Boyer, Vincent Loriot, Franck Lepine, Saikat Nandi
Summary: In attosecond chemistry, isotope labeling is an effective tool for unraveling relaxation pathways in highly excited photoionized molecules. Through experiments and calculations, it was found that nuclear and electron-nuclear dynamics in ethylene were almost 40% faster compared to its deuterated counterpart.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Optics
Xiao Jia, Xin Zhao
Summary: Ultrafast lasers have been widely studied for their ability to drill microchannels in transparent materials. However, achieving satisfactory aspect ratios has been a challenge, and the mechanisms of self-termination in drilling are still not well understood. In this study, we conducted a comprehensive investigation on the direct drilling of fused silica using an ultrafast laser, and successfully achieved uniform and taper-free channels with aspect ratios of -35:1 and decent sidewall roughness. We also identified and examined new self-termination mechanisms in drilling at nonoptimal sample moving speeds.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Kai Liao, Wenjun Wang, Xuesong Mei, Wenwen Tian, Hai Yuan, Mingqiong Wang, Bozhe Wang
Summary: This paper predicts the width and depth of tapered microchannels in silica glass using a combination of theoretical modeling and machine learning. The study proposes a machine learning method to solve the complex nonlinear mapping relationship between microchannel depth and processing parameters. The developed approach provides an effective parameter optimization strategy for achieving microchannels of specific sizes.
JOURNAL OF INTELLIGENT MANUFACTURING
(2023)
Article
Engineering, Electrical & Electronic
Khaled Barhoum, Alena S. Shishkina, Roman A. Zakoldaev, Olga V. Andreeva
Summary: This study proposes a novel method for fabricating microchannels in two-phase glass using femtosecond direct laser writing (FDLW) and chemical etching. Different pulse durations, laser powers, and scanning speeds were used to create microchannels with varying widths and layer properties. After chemical etching, the resulting microchannels exhibited highly uniform morphology, high aspect ratio, and a pronounced refractive index surrounding layer, making them potentially suitable as waveguide layers.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Chenchong Wang, Zhen Zhang, Xueyong Jing, Zenan Yang, Wei Xu
Summary: In this study, a process optimization framework combining molecular dynamics simulation, machine learning, and high-throughput optimization algorithm is proposed to solve efficiency and quality problems in femtosecond laser percussion drilling. The framework can establish the relationship between laser parameters and target machining performance quickly and accurately, and determine the optimal process.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ivan Madan, Eduardo J. C. Dias, Simone Gargiulo, Francesco Barantani, Michael Yannai, Gabriele Berruto, Thomas LaGrange, Luca Piazza, Tom T. A. Lummen, Raphael Dahan, Ido Kaminer, Giovanni Maria Vanacore, F. Javier Garcia de Abajo, Fabrizio Carbone
Summary: Understanding and actively controlling the dynamics of nonequilibrium electron clouds is crucial for various applications. However, these clouds evolve in a complex manner on small scales, making them difficult to study. In this study, we use an ultrafast transmission electron microscope to solve the challenge of characterizing the evolution of electron clouds generated on metallic structures, providing insights into their intricate mechanisms and dynamics. This technique, known as charge dynamics electron microscopy (CDEM), opens up possibilities for studying a wide range of nonequilibrium electrodynamic phenomena on the nanoscale.
Article
Optics
Zhen Zhang, Shangyu Liu, Yuqiang Zhang, Chenchong Wang, Shiyu Zhang, Zenan Yang, Wei Xu
Summary: Machine learning was successfully applied to establish an accurate predictive model for femtosecond laser trepan drilling process, which provided quick and accurate results, improved efficiency, and avoided complex experiments. By combining machine learning with a high-throughput optimization algorithm, optimized solutions were designed for a wide range of process spaces, and the reliability of the optimized process was verified through experiments.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Matthew Bain, Jose L. Godinez Castellanos, Stephen E. Bradforth
Summary: High-repetition-rate lasers have the potential to revolutionize ultrafast spectroscopy by enabling routine analysis for machine learning models in the design of photochemical syntheses. In this study, we combine innovations in line scan cameras and micro-electro-mechanical grating modulators with high-pressure liquid chromatography pumps to develop a transient absorption spectrometer that can characterize photoreactions in minutes. Additionally, we demonstrate the utility of this technique in exploring the effects of conformational modification on excited-state processes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Ceramics
Jincheng Lei, Jie Chen, Yuzhe Hong, Qi Zhang, Qiushi Chen, Jianhua Tong, Hai Xiao, Fei Peng, Rajendra K. Bordia
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Engineering, Multidisciplinary
Tong Jiao, Zhi Zhou, Jia Liu, Hai Xiao, Jinping Ou
Article
Optics
Qi Zhang, Jincheng Lei, Yizheng Chen, Jianan Tang, Yongji Wu, Liwei Hua, Hai Xiao
Article
Engineering, Electrical & Electronic
Qi Zhang, Jincheng Lei, Yizheng Chen, Yongji Wu, Hai Xiao
IEEE PHOTONICS TECHNOLOGY LETTERS
(2020)
Article
Materials Science, Ceramics
Yuzhe Hong, Zhaoxi Chen, Jincheng Lei, Zhao Zhang, Hai Xiao, Konstantin G. Kornev, Rajendra K. Bordia, Jianhua Tong, Fei Peng
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Shenglong Mu, Hua Huang, Akihiro Ishii, Yuzhe Hong, Aaron Santomauro, Zeyu Zhao, Minda Zou, Fei Peng, Kyle S. Brinkman, Hai Xiao, Jianhua Tong
Article
Materials Science, Multidisciplinary
Jincheng Lei, Qi Zhang, Zeyu Zhao, Yizheng Chen, Jennifer Gao, Jianhua Tong, Fei Peng, Hai Xiao
ADVANCED MATERIALS TECHNOLOGIES
(2020)
Article
Biochemistry & Molecular Biology
Shenglong Mu, Yuzhe Hong, Hua Huang, Akihiro Ishii, Jincheng Lei, Yang Song, Yanjun Li, Kyle S. Brinkman, Fei Peng, Hai Xiao, Jianhua Tong
Article
Engineering, Electrical & Electronic
Baokai Cheng, Yang Song, Liwei Hua, Hai Xiao
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2020)
Article
Engineering, Multidisciplinary
Adam Trontz, Shixuan Zeng, Baokai Cheng, Hai Xiao, Junhang Dong
Article
Energy & Fuels
Akihiro Ishii, Shenglong Mu, Yuqing Meng, Hua Huang, Jincheng Lei, Yanjun Li, Fei Peng, Hai Xiao, Jianhua Tong, Kyle S. Brinkman
Article
Engineering, Electrical & Electronic
Liwei Hua, Xuran Zhu, Scott DeWolf, Jincheng Lei, Qi Zhang, Lawrence Murdoch, Hai Xiao
Summary: This article introduces a signal processing method using the chirp effect of EOM to demodulate optical interference phase in a CMPI distributed sensing system. By controlling the phase shift between adjacent pulses, accurate calculation of interference phase and OPD can be achieved. The method demonstrates good linearity, high resolution, and large dynamic range for distributed strain sensing.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Analytical
Qingbo Yang, Alexandre Cristea, Charles Roberts, Kun Liu, Yang Song, Hai Xiao, Honglan Shi, Yinfa Ma
Proceedings Paper
Engineering, Manufacturing
Qi Zhang, Jincheng Lei, Yizheng Chen, Jianan Tang, Yongji Wu, Liwei Hua, Hai Xiao
LASER 3D MANUFACTURING VII
(2020)
Proceedings Paper
Engineering, Biomedical
Qi Zhang, Jincheng Lei, Liwei Hua, Yongji Wu, Xuran Zhu, Hai Xiao
OPTICAL FIBERS AND SENSORS FOR MEDICAL DIAGNOSTICS AND TREATMENT APPLICATIONS XX
(2020)
