scholarly journals Dynamic diffraction effects and coherent breathing oscillations in ultrafast electron diffraction in layered 1T-TaSeTe

2017 ◽  
Vol 4 (4) ◽  
pp. 044012 ◽  
Author(s):  
Linlin Wei ◽  
Shuaishuai Sun ◽  
Cong Guo ◽  
Zhongwen Li ◽  
Kai Sun ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Ultrafast Electron Diffraction ◽  
Dynamic Diffraction ◽  
Diffraction Effects

Transmission Electron Diffraction Analysis by Computer

1970 ◽  
Vol 28 ◽  
pp. 40-41
Author(s):  
R.A. Ploc ◽  
G.H. Keech
Keyword(s):  
Electron Diffraction ◽  
Input Data ◽  
Reciprocal Lattice ◽  
Computer Programme ◽  
Transmission Electron Diffraction ◽  
Usual Procedure ◽  
Transmission Electron ◽  
Complex Shapes ◽  
Computer Input ◽  
Diffraction Effects

An unambiguous analysis of transmission electron diffraction effects requires two samplings of the reciprocal lattice (RL). However, extracting definitive information from the patterns is difficult even for a general orthorhombic case. The usual procedure has been to deduce the approximate variables controlling the formation of the patterns from qualitative observations. Our present purpose is to illustrate two applications of a computer programme written for the analysis of transmission, selected area diffraction (SAD) patterns; the studies of RL spot shapes and epitaxy.When a specimen contains fine structure the RL spots become complex shapes with extensions in one or more directions. If the number and directions of these extensions can be estimated from an SAD pattern the exact spot shape can be determined by a series of refinements of the computer input data.

scholarly journals Ultrafast Optics: Sub‐10‐fs Timing for Ultrafast Electron Diffraction with THz‐Driven Streak Camera (Laser Photonics Rev. 15(2)/2021)

2021 ◽  
Vol 15 (2) ◽  
pp. 2170013
Author(s):  
Junho Shin ◽  
Hyun Woo Kim ◽  
In Hyung Baek ◽  
Sunjeong Park ◽  
Hyeon Sang Bark ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Streak Camera ◽  
Ultrafast Optics ◽  
Ultrafast Electron Diffraction

Compressed Ultrafast Electron Diffraction Imaging Through Electronic Encoding

2018 ◽  
Vol 10 (5) ◽  
Author(s):  
Dalong Qi ◽  
Chengshuai Yang ◽  
Fengyan Cao ◽  
Jinyang Liang ◽  
Yilin He ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Ultrafast Electron Diffraction ◽  
Diffraction Imaging

scholarly journals Dynamic diffraction artefacts in Bragg coherent diffractive imaging

2018 ◽  
Vol 51 (1) ◽  
pp. 167-174 ◽  
Author(s):  
Wen Hu ◽  
Xiaojing Huang ◽  
Hanfei Yan
Keyword(s):  
Theoretical Study ◽  
Diffraction Limit ◽  
Complex Object ◽  
Diffractive Imaging ◽  
Dynamical Diffraction ◽  
Coherent Diffractive Imaging ◽  
Dynamic Diffraction ◽  
Diffraction Effects

This article reports a theoretical study on the reconstruction artefacts in Bragg coherent diffractive imaging caused by dynamical diffraction effects. It is shown that, unlike the absorption and refraction effects that can be corrected after reconstruction, dynamical diffraction effects have profound impacts on both the amplitude and the phase of the reconstructed complex object, causing strong artefacts. At the dynamical diffraction limit, the reconstructed shape is no longer correct, as a result of the strong extinction effect. Simulations for hemispherical particles of different sizes show the type, magnitude and extent of the dynamical diffraction artefacts, as well as the conditions under which they are negligible.

scholarly journals Liquid-phase mega-electron-volt ultrafast electron diffraction

2021 ◽  
Author(s):  
Joao Pedro Figueira Nunes ◽  
Kathryn Ledbetter ◽  
Ming-Fu Lin ◽  
Michael Kozina ◽  
Elisa Biasin ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Electron Diffraction ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt
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