Project Coordinator 2.2 "Strong-field Few-body Systems"
We are investigating the dynamics of strong field interaction with atoms, molecules and ordered, loosely bound atomic or molecular structures, where the constituents still show their individual characteristics. These loosely bound structures are usually found in the form of small van der Waals clusters, however, also molecules assume this characteristic during dissociation at large internuclear separation. Characteristic of these systems are closely spaced electronic states at a large internuclear separation where the electrons start to localize at the individual constituents.
Besides strong field phenomena we are interested in electron dynamics in the bound part of the atomic spectrum and in the ionization continuum of atoms either in energy ranges structured by Fano resonances or in the unstructured continuum.
The main instruments employed in these investigations are
- laser systems delivering high intensity pulses with pulse widths in the femtosecond range
- a source for generation of high order harmonics of this laser radiation
- a reaction microscope (see the Fig.) capable to determine the momentum of any charged particle emerging from the interaction of the laser pulses with the respective target in a correlated way
10/1975 – 7/1982 Study of Physics, Univ. Bielefeld
Diploma thesis: "Stepwise photoionization of molecules and of atomic hydrogen with mass selective ion detection"
8/1982 – 10/1986 Research assistant, Phys. Dep., Univ. Bielefeld, Prof. Dr. K. H. Welge
PhD thesis: "Laser spectroscopy on highly excited Rydberg states of atomic and molecular hydrogen"
11/1986 – 2/1993 Research fellow, Phys. Dep., Univ. Bielefeld, Prof. Dr. K. H. Welge
7/1991 Habilitation, Univ. Bielefeld
3/1993 – 6/1993 Scientist at the Max-Born-Institute
Since 7/1993 Department head at the Max-Born-Institute
- Routes to double ionization in combined extreme ultraviolet and infrared pulses Physical Review A 75 (2007) 033408/1-4
- Non-sequential double ionization in a few-cycle laser pulse: the influence of the carrier–envelope phase Journal of Modern Optics 53 (2006) 149-162
- Reaction microscope study of near-threshold photo double ionisation of xenon using high harmonics Journal of Physics B-Atomic, Molecular and Optical Physics 38 (2005) L389-96
- Influence of molecular structure on double ionization of N2 and O2 by high intensity ultrashort laser pulses Physical Review Letters 92 (2004) 173001/1-14
- Nonsequential double ionization at the single-optical-cycle limit Physical Review Letters 93 (2004) 263001/1-4
- Strongly directed electron emission in non-sequential double ionization of Ne by intense laser pulses Journal of Physics B-Atomic, Molecular and Optical Physics 36 (2003) L113-119
- Rescattering of ultra-low energy electrons for single ionization of Ne in the tunelling regime Physical Review Letters 91 (2003) 113002/1-4
- Laser-induced non-sequential double ionization investigated and and below threshold for electron impact ionization Journal of Physics B-Atomic, Molecular and Optical Physics 36 (2003) 3269-3280
- Non-sequential multiple ionization in strong laser pulses Many-particle quantum dynamics in atomic and molecular fragmentation 35 Springer Verlag (2003) 317-338
- Correlated two-electron dynamics in strong-field double ionization Physical Review A 65 (2002) 035401/1-4