Observation of ultrafast lattice heating using time resolved electron diffraction

2009 ◽  
Vol 94 (10) ◽  
pp. 101910 ◽  
Author(s):  
M. Ligges ◽  
I. Rajkovic ◽  
P. Zhou ◽  
O. Posth ◽  
C. Hassel ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Time Resolved ◽  
Lattice Heating

Observation of Ultrafast Lattice Heating in thin Metal Films using Time-resolved Electron Diffraction

2009 ◽  
Vol 1230 ◽  
Author(s):  
Manuel Ligges ◽  
Carla Streubühr ◽  
Thorsten Brazda ◽  
Oliver Posth ◽  
Christph Hassel ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Temporal Evolution ◽  
Metal Films ◽  
Thin Metal ◽  
Thin Metal Films ◽  
Diffraction Intensity ◽  
Time Resolved ◽  
Lattice Heating

AbstractWe show that time-resolved electron diffraction is capable of revealing the ultrafast lattice heating in thin metal films following excitation by a femtosecond laser pulse. The build-up of the lattice temperature leads to a reduction of the diffraction intensity of the various diffraction orders due to the Debye-Waller-effect. We also observed a reduction of the transmitted (000)-signal which exhibits the same temporal evolution as the diffraction signals.

Electron Channeling Patterns

1977 ◽  
Vol 35 ◽  
pp. 12-13
Author(s):  
David C. Joy
Keyword(s):  
Electron Diffraction ◽  
Incidence Angle ◽  
Photographic Plate ◽  
Diffraction Effect ◽  
Angle Of Incidence ◽  
Bulk Single Crystal ◽  
Time Resolved ◽  
Electron Channeling ◽  
Spatially Resolved ◽  
Large Bulk

Electron channeling patterns (ECP) were first found by Coates (1967) while observing a large bulk, single crystal of silicon in a scanning electron microscope. The geometric pattern visible was shown to be produced as a result of the changes in the angle of incidence, between the beam and the specimen surface normal, which occur when the sample is examined at low magnification (Booker, Shaw, Whelan and Hirsch 1967).A conventional electron diffraction pattern consists of an angularly resolved intensity distribution in space which may be directly viewed on a fluorescent screen or recorded on a photographic plate. An ECP, on the other hand, is produced as the result of changes in the signal collected by a suitable electron detector as the incidence angle is varied. If an integrating detector is used, or if the beam traverses the surface at a fixed angle, then no channeling contrast will be observed. The ECP is thus a time resolved electron diffraction effect. It can therefore be related to spatially resolved diffraction phenomena by an application of the concepts of reciprocity (Cowley 1969).

scholarly journals Femtosecond time-resolved MeV electron diffraction

2015 ◽  
Vol 17 (6) ◽  
pp. 063004 ◽  
Author(s):  
Pengfei Zhu ◽  
Y Zhu ◽  
Y Hidaka ◽  
L Wu ◽  
J Cao ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Time Resolved

Performance of an Indium-sealed S-band RF Photoelectron Gun for Time-resolved Electron Diffraction Experiments

2019 ◽  
Vol 74 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Hyun Woo Kim ◽  
Kyu-Ha Jang ◽  
In Hyung Baek ◽  
Kitae Lee ◽  
Young Uk Jeong ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Time Resolved ◽  
Photoelectron Gun

scholarly journals Towards understanding triiodide photochemistry in the solid state by femtosecond electron diffraction

2019 ◽  
Vol 205 ◽  
pp. 09007
Author(s):  
Rui Xian ◽  
Stuart A. Hayes ◽  
Gaston Corthey ◽  
Carole A. Morrison ◽  
Alexander Marx ◽  
...  
Keyword(s):  
Solid State ◽  
Electron Diffraction ◽  
Large Amplitude ◽  
Atomic Level ◽  
Coherent Motion ◽  
Reaction Products ◽  
Time Resolved ◽  
Femtosecond Electron Diffraction

The photochemistry of the triiodide anion has been investigated by femtosecond electron diffraction. The time-resolved signal indicates the presence of reaction products and large-amplitude coherent motion produced by participating species. To reconstruct the atomic detail of the reaction and identify the major contributors to the detected signal, we outline the approach for atomic-level reconstruction.

Phonon confinement effects in ultrathin epitaxial bismuth films on silicon studied by time-resolved electron diffraction

2009 ◽  
Vol 80 (2) ◽  
Author(s):  
B. Krenzer ◽  
A. Hanisch-Blicharski ◽  
P. Schneider ◽  
Th. Payer ◽  
S. Möllenbeck ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Phonon Confinement ◽  
Confinement Effects ◽  
Time Resolved ◽  
Bismuth Films
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