期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep36224
关键词
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资金
- US Air Force Office of Scientific Research [FA9550-12-1-0310]
- US National Science Foundation [1535628]
- US Department of Energy [DE-NA0002372, DE-FG0203ER46028]
- European Research Council, ERC Starting Grant FEMTOELEC [306708]
- European Research Council (ERC) [306708] Funding Source: European Research Council (ERC)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1535628] Funding Source: National Science Foundation
Recent progress in laser wakefield acceleration has led to the emergence of a new generation of electron and X-ray sources that may have enormous benefits for ultrafast science. These novel sources promise to become indispensable tools for the investigation of structural dynamics on the femtosecond time scale, with spatial resolution on the atomic scale. Here, we demonstrate the use of laser-wakefield-accelerated electron bunches for time-resolved electron diffraction measurements of the structural dynamics of single-crystal silicon nano-membranes pumped by an ultrafast laser pulse. In our proof-of-concept study, we resolve the silicon lattice dynamics on a picosecond time scale by deflecting the momentum-time correlated electrons in the diffraction peaks with a static magnetic field to obtain the time-dependent diffraction efficiency. Further improvements may lead to femtosecond temporal resolution, with negligible pump-probe jitter being possible with future laser-wakefield-accelerator ultrafast-electron-diffraction schemes.
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