Ultrafast electron diffraction (UED), also known as femtosecond electron diffraction (FED), is a pump-probe experimental method based on the combination of optical pump-probe spectroscopy and electron diffraction. UED provides information on the dynamical changes of the structure of materials. It is very similar to time resolved crystallography, but instead of using X-rays as the probe, it uses electrons. In the UED technique, a femtosecond (fs) laser optical pulse excites (pumps) a sample into an excited, usually non-equilibrium, state. The pump pulse may induce chemical, electronic or structural transitions. After a finite time interval, a fs electron pulse is incident upon the sample. The electron pulse undergoes diffraction as a result of interacting with the sample. The diffraction signal is, subsequently, detected by an electron counting instrument such as a CCD camera. Specifically, after the electron pulse diffracts from the sample, the scattered electrons will form a diffraction pattern (image) on a CCD camera. This pattern contains structural information about the sample. By adjusting the time difference between the arrival (at the sample) of the pump and probe beams, one can obtain a series of diffraction patterns as a function of the various time differences. The diffraction data series can be concatenated in order to produce a motion picture of the changes that occurred in the data. UED can provide a wealth of dynamics on charge carriers, atoms, and molecules.
and 24 Related for: Ultrafast electron diffraction information
Ultrafastelectrondiffraction (UED), also known as femtosecond electrondiffraction (FED), is a pump-probe experimental method based on the combination...
selecting the diffracted beams indicated in diffraction pattern with circles (b) using an aperture at the back focal plane. Grains from which electrons are scattered...
Ultrafast scanning electron microscopy (UFSEM) combines two microscopic modalities, Pump-probe microscopy and Scanning electron microscope, to gather...
brightness electron beams. Electron beams generated with photocathodes are commonly used for free electron lasers and for ultrafastelectrondiffraction. Photocathodes...
control the electron beam, for instance focusing them to produce magnified images or electrondiffraction patterns. As the wavelength of an electron can be...
diffraction is with X-rays, the focus of this article although some aspects of neutron powder diffraction are mentioned. (Powder electrondiffraction...
femtochemistry". He also made critical contributions in ultrafastelectrondiffraction, which uses short electron pulses rather than light pulses to study chemical...
typically using a diffraction grating to disperse the light and a slit to select the desired wavelength; however, a diffraction grating introduces path...
as the main electron source for single-pass synchrotron light sources, such as free-electron lasers and for ultrafastelectrondiffraction setups. The...
which goes together naturally with low-energy electron diffraction (LEED), and low-energy electron microscopy (LEEM). In biology, it is called photoelectron...
Empowering Design, within the context of Human–computer interaction Ultrafastelectrondiffraction This disambiguation page lists articles associated with the...
regions. Most ultrafast imaging techniques are variations on standard pump-probe experiments. Some commonly used techniques are ElectronDiffraction imaging...
In optics, an ultrashort pulse, also known as an ultrafast event, is an electromagnetic pulse whose time duration is of the order of a picosecond (10−12...
and electron microscopy involve the diffraction, reflection, or refraction of electromagnetic radiation/electron beams interacting with the specimen,...
to understand interference and diffraction. Interference occurs when one or more wavefronts are superimposed. Diffraction occurs when a wavefront encounters...
spectrum, then the light goes through the sample to a dispersion array (diffraction grating instrument) and captured by a photodiode. For astronomical purposes...
known for developing attosecond electron microscopy and attosecond electrondiffraction (Attomicroscopy) to image the electron dynamics of matter in real-time...
the phenomenon of optical dispersion in a prism, or that of diffraction using a diffraction grating, to spatially separate the colors of light. It usually...
neutron energy, indicates a free neutron's kinetic energy, usually given in electron volts. The term temperature is used, since hot, thermal and cold neutrons...
participates. These are: Centre for Free-Electron Laser Science (CFEL): Investigation of ultrafast phenomena with free-electron lasers and optical lasers, studies...
spacings, stacking order, and interlayer twist---is obtainable using 3D electrondiffraction Novoselov, K. S.; Geim, A. K.; Morozov, S. V.; Jiang, D.; Zhang,...
showed that high harmonic generation tomography and laser-induced electrondiffraction to perform time-resolved dynamic imaging of complex molecular materials...
Global Information