Hannover 2020 – scientific programme

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A: Fachverband Atomphysik

A 9: Poster Session - Atomic Physics I

A 9.16: Poster

Monday, March 9, 2020, 16:00–18:00, Empore Lichthof

Numerical simulations of high-order harmonic generation: from atomic to extended systems — •Chuan Yu, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

In recent years, research on high-order harmonic generation (HHG) has been extended from gas-phase atoms to bulk solids. Compared with the well-established three-step model for atoms, the HHG processes in extended systems are more complicated and still less understood. To further explore the connection between atomic and solid-state HHG, we perform time-dependent density functional theory (TDDFT) simulations for both finite and extended model systems. The TDDFT approach, accounting for many-electron effects in a self-consistent manner, has turned out to be flexible and useful in studying the effects of finite size, impurity and disorder. On the basis of numerical simulations within the TDDFT framework, we may better elucidate the transition from atomic to solid-state HHG.