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Ultrafast electron diffraction from nanophotonic waveforms via dynamical Aharonov-Bohm phases

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2020

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Mohler, Kathrin J.
Ehberger, Dominik
Gronwald, Imke
Lange, Christoph

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European Union (EU): 647771

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Science advances. American Association for the Advancement of Science (AAAS). 2020, 6(47), eabc8804. eISSN 2375-2548. Available under: doi: 10.1126/sciadv.abc8804

Zusammenfassung

Electron interferometry via phase-contrast microscopy, holography, or picodiffraction can provide a direct visualization of the static electric and magnetic fields inside or around a material at subatomic precision, but understanding the electromagnetic origin of light-matter interaction requires time resolution as well. Here, we demonstrate that pump-probe electron diffraction with all-optically compressed electron pulses can capture dynamic electromagnetic potentials in a nanophotonic material with sub-light-cycle time resolution via centrosymmetry-violating Bragg spot dynamics. The origin of this effect is a sizable quantum mechanical phase shift that the electron de Broglie wave obtains from the oscillating electromagnetic potentials within less than 1 fs. Coherent electron imaging and scattering can therefore reveal the electromagnetic foundations of light-matter interaction on the level of the cycles of light.

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530 Physik

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ISO 690MOHLER, Kathrin J., Dominik EHBERGER, Imke GRONWALD, Christoph LANGE, Rupert HUBER, Peter BAUM, 2020. Ultrafast electron diffraction from nanophotonic waveforms via dynamical Aharonov-Bohm phases. In: Science advances. American Association for the Advancement of Science (AAAS). 2020, 6(47), eabc8804. eISSN 2375-2548. Available under: doi: 10.1126/sciadv.abc8804
BibTex
@article{Mohler2020-11Ultra-51897,
  year={2020},
  doi={10.1126/sciadv.abc8804},
  title={Ultrafast electron diffraction from nanophotonic waveforms via dynamical Aharonov-Bohm phases},
  number={47},
  volume={6},
  journal={Science advances},
  author={Mohler, Kathrin J. and Ehberger, Dominik and Gronwald, Imke and Lange, Christoph and Huber, Rupert and Baum, Peter},
  note={Article Number: eabc8804}
}
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