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

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

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EICHBERGER, 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. 102(12), 121106. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4798518

@article{Eichberger2013-03-25Femto-41892, title={Femtosecond streaking of electron diffraction patterns to study structural dynamics in crystalline matter}, year={2013}, doi={10.1063/1.4798518}, 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} }

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 4H<sub>b</sub>-TaSe<sub>2</sub> 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. Schwoerer, Heinrich Demsar, Jure 2018-03-22T08:53:39Z Demsar, Jure Kassier, Günther Eichberger, Maximilian Kassier, Günther Schwoerer, Heinrich Eichberger, Maximilian 2018-03-22T08:53:39Z Haupt, Kerstin von Flotow, Andrea Erasmus, Nicolas Femtosecond streaking of electron diffraction patterns to study structural dynamics in crystalline matter Haupt, Kerstin Erasmus, Nicolas eng 2013-03-25 von Flotow, Andrea

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