Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Poster Wednesday: Surface Structure, Epitaxy and Growth
O 65.15: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B1
Photoelectron holography -- an experimentalist's approach to computer calculated reconstructions — •Matthias Gianfelice1, Christopher Kohlmann1,2, and Carsten Westphal1,2 — 1Experimental Pysics I - TU Dortmund University, Otto-Hahn-Str. 4a, D-44221 Dortmund — 2DELTA - TU Dortmund University, Maria-Goeppert-Mayer-Str. 2, D-44221 Dortmund
The determination of atom locations within surface structures is of great importance for basic science and for applications. Atomic force microscopy allows the analysis of the uppermost atomic layer, however this technique does not provide any information about the three-dimensional subsurface structure.
D. Gabor proposed a holographic approach suggesting electron waves for three-dimensional atom imaging. The electron wave length is in the order of the atom distances and thus should be well suited for the determination of atom structures. Unfortunately it is very hard to reconstruct atom images from a detection hologram because of non-isotropic electron scattering.
In this contribution we present recent progress on reconstructing three-dimensional atom images from electron holograms.