Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)
O 14.77: Poster
Montag, 27. März 2006, 18:00–21:00, P2
SMART: The first operating spectro-microscope with aberration correction — •Florian C. Maier1, Thomas Schmidt1, Helder Marchetto2, Ulrich Groh1, Pierre L. Lévesque2, Tomáš Skála2, Rainer Fink3, Hans-Joachim Freund2, Eberhard Umbach1, and the SMART-Collaboration1,2,3,4,5,6,7 — 1Univ. Würzburg — 2Fritz-Haber-Institut, Berlin — 3Univ. Erlangen-Nürnberg — 4Technische Univ. Clausthal — 5Technische Univ. Darmstadt — 6Carl Zeiss, Oberkochen — 7BESSY GmbH, Berlin
The lateral resolution in photoelectron emission microscopy (PEEM) is basically limited by aberrations, which can only be overcome by suitable correction techniques. The SMART (Spectro-Microscope with Aberration-correction for Resolution and Transmission enhancement) is worldwide the first operating electron microscope which uses an electrostatic tetrode mirror combined with a highly symmetric magnetic beam-splitter to compensate simultaneously for both, the chromatic and spherical aberrations. SMART aims at a lateral resolution below 2 nm with an energy resolution of at least 100 meV and is therefore the most ambitious project in the field of spectroscopic microscopy. In addition to the high lateral resolution a gain in transmission of up to two orders of magnitude is obtained. The instrument excels in a variety of contrast mechanisms (photo-emitted and reflected electrons) and in different operation modes (microscopy, spectroscopy and diffraction) and therefore enables a comprehensive surface characterization using various methods quasi-simultaneously.
Project funded by BMBF under contract no. 05 KS4WWB/4