Erlangen 2022 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 58: Matter Wave Optics

Q 58.1: Poster

Donnerstag, 17. März 2022, 16:30–18:30, P

Coulomb-induced loss of spatial coherence of femtosecond laser-triggered electrons from needle tips — •Jonas Heimerl, Stefan Meier, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen

In the past, tungsten needle tips have been a playground to study a plethora of effects around non-linear electron photoemission. The emitted electrons from such tips are strongly localized to nanometer length and femtosecond time scales when using few-cycle laser pulses. Because of the spatial localization, the electrons possess a high spatial coherence, which can be probed by matter wave interference experiments [1]. In this contribution, we show how Coulomb interactions in the multi-electron regime reduce the spatial coherence, well supported by numerical simulations. In a further step, we use these results to make estimations towards the correlation between two electron wavepackets.
[1] S. Meier et al., Appl. Phys. Lett. 113, 143101 (2018).