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MI: Fachverband Mikrosonden
MI 6: X-ray imaging, holography and tomography
MI 6.7: Talk
Wednesday, March 28, 2012, 14:00–14:15, TA 201
Soft X-ray tomoholography — •Erik Guehrs1,2, Andreas M. Stadler2, Sam Flewett1, Stefanie Frömmel1, Jan Geilhufe3, Bastian Pfau1, Torbjörn Rander1, Stefan Schaffert1, Georg Büldt2,4, and Stefan Eisebitt1,3 — 1Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin — 2Institute of Complex Systems, Forschungszentrum Jülich, 52428 Jülich — 3Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin — 4Research-Educational Centre Bionanophysics, Moscow Institute of Physics and Technology, 141700 Dolgoprudniy, Russia
Fourier transform holography (FTH) is a well established imaging method in the soft X-ray regime. In common mask-based FTH the reference wave is produced by a small pinhole which is physically connected to the sample. Due to the high aspect ratio (1:10) of the pinhole it is not possible to record a tomographic dataset as the required rotation of the sample blocks the transmission through the pinhole at small angles. Therefore, only 2D projections have been imaged until now using soft X-ray FTH. However, the determination of the three-dimensional structure of samples is of high interest in many scientific areas. We demonstrate an X-ray imaging method which combines Fourier transform holography with tomography ("tomoholography'') for 3D microscopic imaging. A 3D image of a diatom shell with a spatial resolution of 140 nm is presented. The experiment is realized by using a small gold sphere as reference wave source for holographic imaging.