1986-1993 Studies in physics at the RWTH Aachen, Germany 1993-1996 Research associate at the Institute of Semiconductor Technology (Prof. Heinrich Kurz), RWTH Aachen Ph.D. thesis: Coherent and incoherent charge carrierer and lattice dynamics in semiconductors and semiconductor heterostructrures 1997-2000 Associate Professor at the Institue of Semiconductor Technology at RWTH Aachen 2000-2004 Head of semiconductor spectroscopy at the Institute of Ion Beam Physics and Materials Research, Research Center Rossendorf, Dresden, Germany since 12/2004 Professor of experimental physics, University of Konstanz, Germany