Results 21 to 30 of about 21,247 (260)

High-Power Lensless THz Imaging of Hidden Objects

IEEE Access, 2021
The potential of pulsed THz radiation for time-of-flight imaging applications is well recognized. However, advances in this field are currently severely limited by the low average power of ultrafast THz sources.
Samira Mansourzadeh, Dilyan Damyanov, Tim Vogel, Frank Wulf, Robert B. Kohlhaas, Bjorn Globisch, Thorsten Schultze, Martin Hoffmann, Jan C. Balzer, Clara J. Saraceno   +9 more
doaj   +1 more source

Femtosecond Laser Fabrication of Anatase TiO2 Micro-nanostructures with Chemical Oxidation and Annealing

Scientific Reports, 2017
The fabrication of nanoporous anatase TiO2 on a microstructured Ti base is achieved through an innovative hybrid fabrication method involving femtosecond laser ablation coupled with H2O2 oxidation and annealing. The anatase TiO2 micro-nanostructures have
Ting Huang, Jinlong Lu, Xin Zhang, Rongshi Xiao, Wuxiong Yang, Qiang Wu   +5 more
doaj   +1 more source

Ultrafast generation and detection of coherent acoustic phonons in SnS0.91Se0.09

Results in Physics, 2023
The rapid growth of attention to tin sulfide (SnS) is due to its efficient application in the field of thermoelectricity, and its doping product SnS0.91Se0.09 can obtain a high average thermoelectric figure of merit (ZTave≈ 1.25).
Xiao-Ran Ma, Ya-Chao Li, Chao Ge, Peng Wang, Hai-Ying Song, Shi-Bing Liu   +5 more
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Dose-efficient scanning Compton X-ray microscopy

Light: Science & Applications, 2023
The highest resolution of images of soft matter and biological materials is ultimately limited by modification of the structure, induced by the necessarily high energy of short-wavelength radiation.
Tang Li, J. Lukas Dresselhaus, Nikolay Ivanov, Mauro Prasciolu, Holger Fleckenstein, Oleksandr Yefanov, Wenhui Zhang, David Pennicard, Ann-Christin Dippel, Olof Gutowski, Pablo Villanueva-Perez, Henry N. Chapman, Saša Bajt   +12 more
doaj   +1 more source

Correlation analysis among multiple images of plasma induced during fiber laser–arc hybrid welding

AIP Advances, 2020
In this study, the multiple imaging morphological features of plasma have been observed by using the multiple-imaging technique during the fiber laser–tungsten insert gas (TIG) arc hybrid welding.
Jianglin Zou, Lida Wang, Rongshi Xiao
doaj   +1 more source

Correlation between the spatters and evaporation vapor on the front keyhole wall during fiber laser keyhole welding

Journal of Materials Research and Technology, 2020
Severe spattering is one of the common problems during fiber laser keyhole welding. In this study, the correlation between the spatter formation and laser-induced evaporation vapor on the front keyhole wall (FKW) was studied by changing the welding speed
Gaolei Zhang, Baoqi Zhu, Jianglin Zou, Qiang Wu, Rongshi Xiao   +4 more
doaj   +1 more source

Molecular polarizability anisotropy of liquid water revealed by terahertz-induced transient orientation

Nature Communications, 2018
The intermolecular dynamics of liquid water impact most biological processes. Here, the authors use intense terahertz electromagnetic pulses to generate a transient, out-of-equilibrium state of the water network to show that the molecules become oriented
Peter Zalden, Liwei Song, Xiaojun Wu, Haoyu Huang, Frederike Ahr, Oliver D. Mücke, Joscha Reichert, Michael Thorwart, Pankaj Kr. Mishra, Ralph Welsch, Robin Santra, Franz X. Kärtner, Christian Bressler   +12 more
doaj   +1 more source

High-power sub-picosecond filamentation at 1.03 µm with high repetition rates between 10 and 100 kHz

APL Photonics, 2023
Filamentation has extensively been explored and is well understood at repetition rates
Robin Löscher, Victor Moreno, Dionysis Adamou, Denizhan K. Kesim, Malte C. Schroeder, Matteo Clerici, Jean-Pierre Wolf, Clara J. Saraceno   +7 more
doaj   +1 more source

Ultrafast Laser Welding of Silicon

Advanced Photonics Research, 2023
While ultrafast laser welding is an appealing technique for bonding transparent workpieces, it is not applicable for joining silicon samples due to nonlinear propagation effects which dramatically diminish the possible energy deposition at the interface.
Maxime Chambonneau, Qingfeng Li, Markus Blothe, Stree Vithya Arumugam, Stefan Nolte   +4 more
openaire   +3 more sources

Generation of 12 nJ Pulse Energy by a Thulium-doped Fiber Mamyshev Oscillator [PDF]

EPJ Web of Conferences, 2022
Schuhbauer B., Adolfs V., Haxsen F., Wienke A., Morgner U., Neumann J., Kracht D.   +6 more
doaj   +1 more source