Imaging Ultrafast Dynamical Diffraction Wave Fronts in Strained Si with Coherent X Rays
Journal article, 2021

Dynamical diffraction effects in thin single crystals produce highly monochromatic parallel x-ray beams with a mutual separation of a few microns and a time delay of a few femtoseconds—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 toward the ambitious goal of strain tailoring new x-ray optics and, conversely, open up the possibility of using ultrafast dynamical diffraction effects to study strain in materials.


Angel Rodriguez-Fernandez

European XFEL

Ana Diaz

Paul Scherrer Institut

Anand Harihara Subramonia Iyer

Chalmers, Physics, Microstructure Physics

Mariana Verezhak

Paul Scherrer Institut

Klaus Wakonig

Paul Scherrer Institut

Magnus Hörnqvist Colliander

Chalmers, Physics, Microstructure Physics

Dina Carbone

Lund University

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 127 15 157402

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Condensed Matter Physics


Chalmers Materials Analysis Laboratory

Areas of Advance

Materials Science



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