Diffraction and microscopy with attosecond electron pulse trains

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2018
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Morimoto, Yuya
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European Union (EU): 647771
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Direct Visualization of Light-Driven Atomic-Scale Carrier Dynamics in Space and Time DIVI
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Nature Physics. 2018, 14(3), pp. 252-256. ISSN 1745-2473. eISSN 1745-2481. Available under: doi: 10.1038/s41567-017-0007-6
Zusammenfassung

Attosecond spectroscopy1–7 can resolve electronic processes directly in time, but a movie-like space–time recording is impeded by the too long wavelength (~100 times larger than atomic distances) or the source–sample entanglement in re-collision techniques8–11. Here we advance attosecond metrology to picometre wavelength and sub-atomic resolution by using free-space electrons instead of higher-harmonic photons1–7 or re-colliding wavepackets8–11. A beam of 70-keV electrons at 4.5-pm de Broglie wavelength is modulated by the electric field of laser cycles into a sequence of electron pulses with sub-optical-cycle duration. Time-resolved diffraction from crystalline silicon reveals a < 10-as delay of Bragg emission and demonstrates the possibility of analytic attosecond–ångström diffraction. Real-space electron microscopy visualizes with sub-light-cycle resolution how an optical wave propagates in space and time. This unification of attosecond science with electron microscopy and diffraction enables space–time imaging of light-driven processes in the entire range of sample morphologies that electron microscopy can access.

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ISO 690MORIMOTO, Yuya, Peter BAUM, 2018. Diffraction and microscopy with attosecond electron pulse trains. In: Nature Physics. 2018, 14(3), pp. 252-256. ISSN 1745-2473. eISSN 1745-2481. Available under: doi: 10.1038/s41567-017-0007-6
BibTex
@article{Morimoto2018-03Diffr-43225,
  year={2018},
  doi={10.1038/s41567-017-0007-6},
  title={Diffraction and microscopy with attosecond electron pulse trains},
  number={3},
  volume={14},
  issn={1745-2473},
  journal={Nature Physics},
  pages={252--256},
  author={Morimoto, Yuya and Baum, Peter}
}
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