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arXiv · 2012.08893

Imaging ultrafast dynamical diffraction wavefronts in strained Si with coherent X-rays

Angel Rodriguez-Fernandez·Ana Diaz·Anand H. S. Iyer·Mariana Verezhak·Klaus Wakonig·Magnus H. Colliander·Dina Carbone
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Abstract

Dynamical diffraction effects in single crystals produce highly monochromatic parallel X-ray beams with a mutual separation of a few micrometer and a time-delay of a few fs -the so-called echoes. This ultrafast diffraction effect is used at X-ray Free Electron Lasers in self-seeding schemes to improve beam monochromaticity. Here, we present a coherent X-ray imaging measurement of echoes from Si crystals and demonstrate that a small surface strain can be used to tune their temporal delay. These results represent a first step towards the ambitious goal of strain-tailoring new X-ray optics.

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Angel Rodriguez-Fernandez, Ana Diaz, Anand H. S. Iyer, Mariana Verezhak, Klaus Wakonig, Magnus H. Colliander, Dina Carbone. 2021-10-11. Imaging ultrafast dynamical diffraction wavefronts in strained Si with coherent X-rays. https://doi.org/10.1103/physrevlett.127.157402

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