Femtosecond streaking of electron diffraction patterns to study structural dynamics in crystalline matter

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2013
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Erasmus, Nicolas
Haupt, Kerstin
Kassier, Günther
von Flotow, Andrea
Schwoerer, Heinrich
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Applied Physics Letters. 2013, 102(12), 121106. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4798518
Zusammenfassung

A table-top femtosecond, non-relativistic, electron diffraction setup is combined with a low-jitter, photo-triggered streak camera to follow the optically induced structural dynamics in complex solids. A temporal resolution of 550 fs is experimentally demonstrated, while the route to streaking with sub-250 fs temporal resolution is outlined. The streaking technique allows for parallel capturing of temporal information as opposed to the serial data acquisition in a conventional scanning femtosecond electron diffraction. Moreover, its temporal resolution is not corrupted by increasing the number of electrons per pulse. Thus, compared to the conventional scanning approach, a substantial increase in signal-to-noise ratio (SNR) can be achieved. These benefits are demonstrated by studying a photo-induced charge density wave phase transition in 4Hb-TaSe2 using both methods. Within the same data acquisition time a three-fold increase in SNR is achieved when compared to the scanning method, with ways for a further improvement outlined.

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ISO 690EICHBERGER, Maximilian, Nicolas ERASMUS, Kerstin HAUPT, Günther KASSIER, Andrea VON FLOTOW, Jure DEMSAR, Heinrich SCHWOERER, 2013. Femtosecond streaking of electron diffraction patterns to study structural dynamics in crystalline matter. In: Applied Physics Letters. 2013, 102(12), 121106. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4798518
BibTex
@article{Eichberger2013-03-25Femto-41892,
  year={2013},
  doi={10.1063/1.4798518},
  title={Femtosecond streaking of electron diffraction patterns to study structural dynamics in crystalline matter},
  number={12},
  volume={102},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Eichberger, Maximilian and Erasmus, Nicolas and Haupt, Kerstin and Kassier, Günther and von Flotow, Andrea and Demsar, Jure and Schwoerer, Heinrich},
  note={Article Number: 121106}
}
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