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High resolution XUV Fourier transform holography on a table top

: Tadesse, G.K.; Eschen, W.; Klas, R.; Hilbert, V.; Schelle, D.; Nathanael, A.; Zilk, M.; Steinert, M.; Schrempel, F.; Pertsch, T.; Tünnermann, A.; Limpert, J.; Rothhardt, J.

Fulltext ()

Scientific Reports 8 (2018), Art. 8677, 8 pp.
ISSN: 2045-2322
Journal Article, Electronic Publication
Fraunhofer IOF ()

Today, coherent imaging techniques provide the highest resolution in the extreme ultraviolet (XUV) and X-ray regions. Fourier transform holography (FTH) is particularly unique, providing robust and straightforward image reconstruction at the same time. Here, we combine two important advances: First, our experiment is based on a table-top light source which is compact, scalable and highly accessible. Second, we demonstrate the highest resolution ever achieved with FTH at any light source (34 nm) by utilizing a high photon flux source and cutting-edge nanofabrication technology. The performance, versatility and reliability of our approach allows imaging of complex wavelength-scale structures, including wave guiding effects within these structures, and resolving embedded nanoscale features, which are invisible for electron microscopes. Our work represents an important step towards real-world applications and a broad use of XUV imaging in many areas of science and technology. Even nanoscale studies of ultra-fast dynamics are within reach.