SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 12: Poster I

A 12.31: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

Numerical Description of Single-Cycle Electron Emission from Tungsten Nanotips — •Elisabeth Anne Herzig, Lennart Seiffert, and Thomas Fennel — University of Rostock, Institute of physics, Albert-Einstein-Straße 23, 18059 Rostock

Exposing nanostructures to strong fields enables the emission of energetic electrons via near-field driven elastic backscattering [1]. The availability of intense single cycle or sub-single cycle waveforms [2, 3] will enable to explore the formation and propagation of attosecond electron pulses in previously inaccessible regimes of the strong-field interaction. Here, the electron emission from tungsten nanotips under intense single-cycle pulses is inspected theoretically via one-dimensional TDSE simulations. The calculated carrier-envelope phase-dependent photoelectron energy spectra reveal prominent signatures with pronounced differences to previous studies performed with many-cycle pulses [4]. The physical origins behind the observed spectral features are disentangled by extending the famous Simple Man’s Model of strong-field physics. Furthermore, collective effects can be unveiled within the one-dimensional time-dependent density functional theory. Here, first insights will be presented and discussed.

[1] M. F. Ciappina et al., Rep. Prog. Phys. 80, 054401 (2017)

[2] A. Wirth et al., Science 334, 195 (2011)

[3] M. T. Hassan et al., Nature 530, 66 (2016)

[4] L. Seiffert et al., J. Phys. B 51, 134001 (2018)