Sub-phonon-period compression of electron pulses for atomic diffraction

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2015
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Gliserin, Alexander
Walbran, Matthew
Krausz, Ferenc
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Direct Visualization of Light-Driven Atomic-Scale Carrier Dynamics in Space and Time DIVI
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Nature communications. 2015, 6, 8723. eISSN 2041-1723. Available under: doi: 10.1038/ncomms9723
Zusammenfassung

Visualizing the rearrangement of atoms in a wide range of molecular and condensed-matter systems requires resolving picometre displacements on a 10-fs timescale, which is achievable using pump-probe diffraction, given short enough pulses. Here we demonstrate the compression of single-electron pulses with a de Broglie wavelength of 0.08 ångström to a full-width at half-maximum duration of 28 fs or equivalently 12-fs root-mean square, substantially shorter than most phonon periods and molecular normal modes. Atomic resolution diffraction from a complex organic molecule is obtained with good signal-to-noise ratio within a data acquisition period of minutes. The electron-laser timing is found to be stable within 5 fs (s.d.) over several hours, allowing pump-probe diffraction at repetitive excitation. These measurements show the feasibility of laser-pump/electron-probe scans that can resolve the fastest atomic motions relevant in reversible condensed-matter transformations and organic chemistry.

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ISO 690GLISERIN, Alexander, Matthew WALBRAN, Ferenc KRAUSZ, Peter BAUM, 2015. Sub-phonon-period compression of electron pulses for atomic diffraction. In: Nature communications. 2015, 6, 8723. eISSN 2041-1723. Available under: doi: 10.1038/ncomms9723
BibTex
@article{Gliserin2015-10-27Subph-43266,
  year={2015},
  doi={10.1038/ncomms9723},
  title={Sub-phonon-period compression of electron pulses for atomic diffraction},
  volume={6},
  journal={Nature communications},
  author={Gliserin, Alexander and Walbran, Matthew and Krausz, Ferenc and Baum, Peter},
  note={Article Number: 8723}
}
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