Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster Session II

A 26.20: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG1

Laser-solid interaction using time-dependent density functional theory — •Tobias Deffge and Dieter Bauer — Institut für Physik, Universität Rostock, 18051 Rostock, Germany

Strong-field physics in solid targets is of fundamental interest because the dispersion relation of the electrons (and all the quasi particles involved) can be tailored via the field-dressed band structure. Applications in ultrafast electronics or novel radiation sources are conceivable. Much of the recent, pioneering theoretical work on the subject is based on the single-active-electron approximation and the assumption that only a few bands are important for the dynamics. Further, surface effects are difficult to take into account in momentum-space approaches.

In our work, we consider a one-dimensional model of a solid slab interacting with a laser field. The band structure is calculated self-consistently using density functional theory. The laser-induced dynamics is studied by solving the time-dependent Kohn-Sham equation in local spin-density approximation. By freezing and unfreezing the Kohn-Sham potential the influence of electron-electron interaction on Bloch oscillations and harmonic generation is investigated. Surface effects are identified.