- Head of Department C3 "Femtosecond Spectroscopy on Solids"
- Coordinator of Project 3.2 "Solids and Nanostructures: Electrons, Spins, and Phonons"
- Coordinator of Project 3.3 "Transient Structures and Imaging with X-rays"
I am interested in ultrafast and nonlinear phenomena in condensed matter, in particular organic and inorganic solids and nanostructures. To this end, I generate and apply ultrashort pulses in a wide spectral range (THz to hard x-ray) to measure the nonequilibrium dynamics of elementary excitations in solids and the ultrafast structural dynamics of crystalline material. Most recent activities are two-dimensional spectroscopy in the THz frequency range (Figure: two phonon coherences in InSb) and femtosecond x-ray absorption experiments using table top high harmonic sources.
1981-1988 Study of physics at the Technical University (TU) of Munich
1988-1991 PhD Work at TU Munich, Physics Department E11 (Prof. W. Kaiser)
1991 Graduation (Dr. rer. nat.) at the TU
1991-1993 Postdoctoral Researcher at the Physics Department E11, TU Munich
1993-1996 Postdoctoral Researcher at the Max-Born-Institute, Berlin
1997 Postdoctoral Researcher at Bell Laboratories (Lucent), Holmdel, NJ, USA
since 1997 Department head of C3 at the Max-Born-Institute, Berlin
1999 Habilitation at the Humboldt University Berlin
Wiggling atoms switch the electric polarization of crystals
Quantum Swing - a pendulum that moves forward and backwards at the same time
Hot means slow: Electron plasma oscillations tuned down with light
The longer the better: Optical long-wavelength pulses generate brilliant ultrashort hard x-ray flashes
- Quantum pathways of carrier and coherent phonon excitation in bismuth Physical Review B 107 (2023) L180303/1-6
- Ultrafast carrier dynamics and symmetry reduction in bismuth by nonperturbative optical excitation in the terahertz range Physical Review B 107 (2023) 245140/1-10
- Nonlinear terahertz polarizability of electrons solvated in a polar liquid Physical Review Letters 131 (2023) 166902/1-6
- Underdamped longitudinal soft modes in ionic crystallites - lattice and charge motions observed by ultrafast x-ray diffraction Structural Dynamics 9 (2022) 024501/1-10
- Field-induced electron generation in water: solvation dynamics and many-body interactions Journal of Physical Chemistry B 126 (2022) 2621-2634
- Coherent polaron dynamics of electrons solvated in polar liquids PNAS Nexus 1 (2022) pgac078/1-8
- Underdamped longitudinal soft mode dynamics in KDP observed by ultrafast x-ray diffraction Ultrafast Phenomena 2022 Optica Publishing Group (2022) Th4A.34/1-2
- Intersubband shift currents in asymmetric quantum wells as a source of mono-cycle terahertz pulses Ultrafast Phenomena 2022 (2022) Tu5A.3/1-2
- Coherent underdamped polarons in liquid alcohols Ultrafast Phenomena 2022 Optica Publishing Group (2022) W4A.30/1-2
- Phonon-induced valence-charge relocation in cubic BN observed by ultrafast x-ray diffraction Ultrafast Phenomena 2022 Optica Publishing Group (2022) Th2B.4/1-2