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Publications in Scientific Journals:

P. Schattschneider, M. Stöger-Pollach, S. Löffler, A. Steiger-Thirsfeld, J. Hell, J. Verbeeck:
"Sub-nanometer free electrons with topological charge";
Ultramicroscopy, 115 (2012), 21 - 25.



English abstract:
The holographic mask technique is used to create freely moving electrons with quantized angular momentum. With electron optical elements they can be focused to vortices with diameters below the nanometer range. The understanding of these vortex beams is important for many applications. Here, we produce electron vortex beams and compare them to a theory of electrons with topological charge. The experimental results show excellent agreement with simulations. As an immediate application, fundamental experimental parameters like spherical aberration and partial coherence are determined.

Keywords:
Partial coherence; Aberrations; Vortex beams; Topological charge


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.ultramic.2012.01.010

Electronic version of the publication:
http://www.sciencedirect.com/science/article/pii/S0304399112000113


Created from the Publication Database of the Vienna University of Technology.