Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 84: Focus Session: Structural Dynamics in Nanoscale Materials Probed by Ultrashort Electron Pulses

O 84.8: Topical Talk

Donnerstag, 19. März 2015, 17:15–17:45, MA 005

Ultrafast single-electron diffraction and its perspectives — •Peter Baum — Ludwig-Maximilians-Universität München — Max-Planck-Institut für Quantenoptik

Matter transformations are basically defined by atomic and electronic motions from initial to final conformations. Ultrafast electron diffraction and microscopy are good at seeing the atoms, but purely electronic motion is still mostly hidden. Here we report our recent progress with single-electron wave packets without space charge [1-2] for advancing 4D diffractive imaging into novel resolution and application regimes. Specifically, we report our shortest pulses so far (28 fs) and first diffraction applications on graphite and carbon nanotubes [3].

[1] Peter Baum, J. Phys. B 47, 124005 (2014).

[2] Gliserin, Apolonski, Krausz, Baum, NJP 14, 073055 (2012).

[3] Lahme, Kealhofer, Krausz, Baum, Struct. Dyn. 1, 034303 (2014).