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X-Ray Optics and Nanoimaging

Our research

Senior scientist: Ulrich Vogt

X-ray nanoimaging is a rapidly evolving frontier at synchrotron radiation and X-ray free-electron laser facilities worldwide. By focusing X-ray radiation to spot sizes as small as 10–100 nanometers, this cutting-edge technology enables groundbreaking research across numerous scientific fields.

The unique capability of X-ray nano imaging lies in its ability to conduct direct in-situ and in-operando experiments, even in extreme physical environments. This technology provides an unparalleled link between a material's structure and its physical properties, offering insights that were previously inaccessible.

We design and manufacture advanced diffractive zone plate optics that achieve diffraction-limited resolution in the 10–100 nm range, tailored for X-ray nano imaging in both the soft and hard X-ray spectrum. In collaboration with Lund University, we have developed the NanoMAX beamline  and a zone-plate-based X-ray microscope at the Swedish synchrotron source MAX IV.

Our long-term goal is to enable 3D X-ray imaging experiments with a resolution as fine as 10 nanometers.

Zone plate pattern by e-beam lithography
Metal-assisted chemical etching of zone plate structures
Multi-beam ptychography images for enlarged field-of-views

Key references

  1. M. Åstrand, M. Kahnt, U. Johansson, U. Vogt, "Adaptive multi-beam X-ray ptychography," Opt. Express 32, 22771-22780 (2024).

  2. M. Åstrand, H. Ohlin, T. Frisk, U. Vogt, "Understanding dose correction for high-resolution 50 kV electron-beam lithography on thick resist layers", Micro and Nano Engeneering 16, 100141 (2022).

  3. R. Akan, K. Parfeniukas, C. Vogt M. S. Toprak, and U. Vogt, "Reaction control of metal-assisted chemical etching for silicon-based zone plate nanostructures", RSC Advances 23, 12628-12634 (2018)

  4. F. Seiboth, A. Schropp, M. Scholz, F. Wittwer, C. Rödel, M. Wunsche, T. Ullsperger, S. Nolte, J. Rahomäki, K. Parfeniukas, U. Vogt, U. Wagner, C. Rau, U. Boesenberg, J. Garrevoet, G. Falkenberg, E. C. Galtier, H. J. Lee, B. Nagler, and C. G. Schroer, "Perfect X-ray focusing via fitting corrective glasses to aberrated optics", Nature Comm. 8, 14623 (2017).

  5. F. Uhlén, J. Rahomäki, D. Nilsson, F. Seiboth, C. Sanz, U. Wagner, C. Rau, and U. Vogt, "Ronchi test for characterization of X-ray nanofocusing optics and beamlines", J. Synch. Rad 21, 1105-1109 (2014).

People

Mattias Åstrand
Mattias Åstrand doctoral student maastra@kth.se Profile