Ultrafast photonic micro-systems to manipulate hard X-rays at 300 picoseconds.

Autor: Chen P; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Jung IW; Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Walko DA; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Li Z; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Gao Y; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Shenoy GK; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., López D; Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA., Wang J; Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, 60439, IL, USA. wangj@aps.anl.gov.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2019 Mar 11; Vol. 10 (1), pp. 1158. Date of Electronic Publication: 2019 Mar 11.
DOI: 10.1038/s41467-019-09077-1
Abstrakt: Time-resolved and ultrafast hard X-ray imaging, scattering and spectroscopy are powerful tools for elucidating the temporal and spatial evolution of complexity in materials. However, their temporal resolution has been limited by the storage-ring timing patterns and X-ray pulse width at synchrotron sources. Here we demonstrate that dynamic X-ray optics based on micro-electro-mechanical-system resonators can manipulate hard X-ray pulses on time scales down to 300 ps, comparable to the X-ray pulse width from typical synchrotron sources. This is achieved by timing the resonators with the storage ring to diffract X-ray pulses through the narrow Bragg peak of the single-crystalline material. Angular velocities exceeding 10 7 degrees s -1 are reached while maintaining the maximum linear velocity well below the sonic speed and material breakdown limit. As the time scale of the devices shortens, the devices promise to spatially disperse the temporal width of X-rays, thus generating a temporal resolution below the pulse-width limit.
Databáze: MEDLINE
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