Monolithic focused reference beam X-ray holography

J. Geilhufe, B. Pfau, M. Schneider, F. Büttner, C. M. Günther, S. Werner, S. Schaffert, E. Guehrs, S. Frömmel, M. Kläui and S. Eisebitt ()
Additional contact information
J. Geilhufe: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
B. Pfau: Institut für Optik und Atomare Physik, Technische Universität Berlin
M. Schneider: Institut für Optik und Atomare Physik, Technische Universität Berlin
F. Büttner: Institut für Optik und Atomare Physik, Technische Universität Berlin
C. M. Günther: Institut für Optik und Atomare Physik, Technische Universität Berlin
S. Werner: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
S. Schaffert: Institut für Optik und Atomare Physik, Technische Universität Berlin
E. Guehrs: Institut für Optik und Atomare Physik, Technische Universität Berlin
S. Frömmel: Institut für Optik und Atomare Physik, Technische Universität Berlin
M. Kläui: Institut für Physik and Exzellenz Graduiertenschule Materials Science in Mainz, Johannes Gutenberg Universität Mainz
S. Eisebitt: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Fourier transform holography is a highly efficient and robust imaging method, suitable for single-shot imaging at coherent X-ray sources. In its common implementation, the image contrast is limited by the reference signal generated by a small pinhole aperture. Increased pinhole diameters improve the signal, whereas the resolution is diminished. Here we report a new concept to decouple the spatial resolution from the image contrast by employing a Fresnel zone plate to provide the reference beam. Superimposed on-axis images of distinct foci are separated with a novel algorithm. Our method is insensitive to mechanical drift or vibrations and allows for long integration times common at low-flux facilities like high harmonic generation sources. The application of monolithic focused reference beams improves the efficiency of high-resolution X-ray Fourier transform holography beyond all present approaches and paves the path towards sub-10 nm single-shot X-ray imaging.

Date: 2014
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DOI: 10.1038/ncomms4008

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