Details

Autor(en) / Beteiligte

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

Titel

Imaging Ultrafast Dynamical Diffraction Wave Fronts in Strained Si with Coherent X Rays

Ist Teil von

• Physical review letters, 2021-10, Vol.127 (15), p.1-157402, Article 157402

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.