Kiel 2011 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen

P 18.24: Poster

Mittwoch, 30. März 2011, 16:30–18:30, Foyer

Laser-assisted photoemission: the case of low-frequency streaking. — •Sebastian Bauch and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel

Laser-assisted photoemission has attracted growing attention in the last decade. Two main fields of ongoing experimental effort exist, the fundamental investigation of ultrafast processes and the application to pulse characterization of currently developed light sources, e.g. free-electron lasers. Both utilize realizations of the light-field induced streak camera, but in different temporal regimes. Adopting well-established methods, we extend previous investigations[1] to the currently evolving experimental situation[2] and present line shapes from laser-assisted photoemission ranging from the well-investigated case of infrared streaking to the widely unexplored low-frequency case of terahertz radiation. Exact solutions of the time-dependent Schrödinger equation are compared to approximate (simple) models. Various effects, including Coulomb effects, wave packet polarization and nucleus effects are addressed.

[1]e.g. O. Smirnova, M. Spanner and M. Ivanov, J. Phys. B. At. Mol. Opt. Phys. 39 S323 (2006)

[2]U. Frühling et al., Nat. Phot. 3 523 (2009)