2008-2013  Guest professor Jilin University, Changchun, China

2008       Guest professor Kazan University, Kazan, Russia

Sept. 2003   Full professor at the university of groningen, Optical Condensed Matter Physics

Jan. 2003    Associate professor at the university of groningen, Optical Condensed Matter Physics

2000-2002   Assistent professor at the university of groningen, FOM \Springplank" position.

Subject: Optical physics in transition-metal compounds.

1996-1999  Akademische Rat" (A13) at the Rheinisch-Westfalische Technische Hochschule, Aachen, Germany.Subjects: Low dimensional electronically correlated systems; Magnetic multilayers and magnetic micro structures; Time resolved linear and non-linear magneto-optics; Inelastic light scattering;

Group: II. Physikalisches Institut (Prof. Dr. G. Guntherodt).

1994-1996  Post-doc at the CNRS/MPI High Magnetic Field Laboratory, Grenoble, France.

Subjects: Electronically correlated materials; Inelastic light scattering and optical absorption in high magnetic _elds.

Group: Semiconductor physics (Prof. Dr. G. Martinez).

1993-1994  Post-doc at the IBM-Almaden Research Center, San Jose, California, U.S.A.

TALENT-stipend awarded by the Dutch organization for scienti_c research (NWO).

Subjects: Physical properties of endohedral fullerenes; Mass spectroscopy; Electron spin resonance

Group: Physical sciences, Fullerenes (Dr. D.S. Bethune).

1988-1992  Ph.D. Research at the University of Nijmegen (The Netherlands).

Thesis: \Dynamical and Electronic Properties of Incommensurate and Fullerene Crystals".

(Co-)Promoters: Prof. Dr. A.G.M. Janner, Prof. Dr. H. van Kempen and Prof. Dr. G.

Meijer.

1983-1988 Physics study at the Technical University of Eindhoven.Graduation thesis: \Magneto-transport phenomena in quantum point contacts".

Supervision: Prof. Dr. J. Wolter and Dr. H. van Houten.

Work carried out at the Philips Research Laboratories at Eindhoven (The Netherlands).