Former Group Members and Collaborators
| Dr. N. Radwell | Dr. Y. Tanguy | Dr. Malte Schulz-Ruhtenberg (University of Muenster) | Dr. Markus Sondermann (University of Muenster) |
| Group of N. A. Loiko (Belorussian Academy of Science, Minsk) | K. F. Huang (Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan) | R. Jaeger (Ulm Photonics) | C. Denz (Institut fuer Angewandte Physik, University of Muenster) |