Results 31 to 40 of about 442,453 (293)

Photonics Breakthroughs 2024: Free-Electron Interaction With Nonlinear Optical States

IEEE Photonics Journal
The field of nonlinear integrated photonics has seen significant advancements, particularly with the emergence of microresonator-based frequency combs, or “microcombs”, which facilitate various applications including frequency metrology ...
Yujia Yang, Jan-Wilke Henke, Arslan S. Raja, F. Jasmin Kappert, Guanhao Huang, Germaine Arend, Zheru Qiu, Armin Feist, Rui Ning Wang, Aleksandr Tusnin, Alexey Tikan, Claus Ropers, Tobias J. Kippenberg   +12 more
doaj   +1 more source

Ponderomotive generation and detection of attosecond free-electron pulse trains

, 2018
Atomic motion dynamics during structural changes or chemical reactions have been visualized by picosecond and femtosecond pulsed electron beams via ultrafast electron diffraction and microscopy.
Hommelhoff, Peter, Kozák, Martin, Schönenberger, Norbert   +2 more
core   +1 more source

Optical versus electron diffraction imaging of Twist-angle in 2D transition metal dichalcogenide bilayers

npj 2D Materials and Applications, 2021
Atomically thin two-dimensional (2D) materials can be vertically stacked with van der Waals bonds, which enable interlayer coupling. In the particular case of transition metal dichalcogenide (TMD) bilayers, the relative direction between the two ...
S. Psilodimitrakopoulos, A. Orekhov, L. Mouchliadis, D. Jannis, G. M. Maragkakis, G. Kourmoulakis, N. Gauquelin, G. Kioseoglou, J. Verbeeck, E. Stratakis   +9 more
doaj   +1 more source

Excitation and Imaging of Resonant Optical Modes of Au Triangular Nano-Antennas Using Cathodoluminescence Spectroscopy

, 2010
Cathodoluminescence (CL) imaging spectroscopy is an important technique to understand resonant behavior of optical nanoantennas. We report high-resolution CL spectroscopy of triangular gold nanoantennas designed with near-vacuum effective index and very ...
Chow, Edmond, Fang, Nicholas X., Fung, Kin-Hung, Kumar, Anil, Mabon, James C.   +4 more
core   +1 more source

Attosecond electron pulses for 4D diffraction and microscopy [PDF]

, 2007
In this contribution, we consider the advancement of ultrafast electron diffraction and microscopy to cover the attosecond time domain. The concept is centered on the compression of femtosecond electron packets to trains of 15-attosecond pulses by the ...
Baum, Peter, Zewail, Ahmed H.
core   +3 more sources

CryoEM screening with a blotting instrument: quantifying parameters affecting ice thickness using semi-automated image analysis

Methods in Microscopy
Cryo-electron microscopy (cryoEM) grid preparation is one of the bottlenecks in using cryoEM for macromolecular structure determination. Despite significant advancements in the development of blot-free instruments, their high cost limits their widespread
Valimehr Sepideh, Cho Ellie, Brown Hamish G., McMillan Paul J., Hanssen Eric   +4 more
doaj   +1 more source

Topological strong field physics on sub-laser cycle time scale

, 2018
Sub-laser cycle time scale of electronic response to strong laser fields enables attosecond dynamical imaging in atoms, molecules and solids. Optical tunneling and high harmonic generation are the hallmarks of attosecond imaging in optical domain ...
Amorim, B., Ivanov, M., Jiménez-Galán, Á., Silva, R. E. F., Smirnova, O.   +4 more
core   +1 more source

Nanoscale Imaging of Kidney Glomeruli Using Expansion Pathology

Frontiers in Medicine, 2018
Kidney glomerular diseases, such as the minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS), and other nephrotic syndromes, are typically diagnosed or confirmed via electron microscopy.
Octavian Bucur, Octavian Bucur, Octavian Bucur, Yongxin Zhao   +3 more
doaj   +1 more source

Single-shot compressed ultrafast photography: a review [PDF]

, 2020
Compressed ultrafast photography (CUP) is a burgeoning single-shot computational imaging technique that provides an imaging speed as high as 10 trillion frames per second and a sequence depth of up to a few hundred frames.
Cao, Fengyan, Ding, Pengpeng, Gao, Liang, He, Yilin, Jia, Tianqing, Liang, Jinyang, Qi, Dalong, Sun, Zhenrong, Wang, Lihong V., Yang, Chengshuai, Yao, Jiali, Zhang, Shian   +11 more
core  

Scanning ultrafast electron microscopy [PDF]

, 2010
Progress has been made in the development of four-dimensional ultrafast electron microscopy, which enables space-time imaging of structural dynamics in the condensed phase. In ultrafast electron microscopy, the electrons are accelerated, typically to 200
Mohammed, Omar F., Yang, Ding-Shyue, Zewail, Ahmed H.   +2 more
core   +1 more source