From May to July 2026, Prof. Dr. Bernard Z. Essimbi from the University of Yaoundé I, Cameroon, visits Paderborn as a guest scientist hosted by the Computational Optoelectronics and Photonics group of Prof. Dr. Torsten Meier at the Department of Physics. Prof. Essimbi is a Humboldt alumnus and has maintained close ties with the Foundation through his international research activities. His three-month research stay at Paderborn University is funded by the Alexander von Humboldt Foundation.
During his stay in Paderborn, Prof. Essimbi is working on the project “Nonlinear Dynamics of Semiconductor Lasers and Resonant Tunneling Diode Integrated Optoelectronic Oscillators.” The project focuses on the complex dynamical behavior of semiconductor lasers and hybrid optoelectronic systems. Such systems are of considerable interest for applications including secure optical communication, microwave photonics, ultrafast signal processing, and the generation of high-purity radio-frequency signals. A particular emphasis of the project lies on semiconductor lasers with optical injection or delayed feedback. These configurations can exhibit a wide range of nonlinear phenomena, including chaos, hyperchaos, multiscroll attractors, and ultrashort pulse generation.
The research topics of Prof. Essimbi have significant overlap with the activities of the Center for Optoelectronics and Photonics Paderborn (CeOPP). Therefore this stay strengthens the scientific exchange between the University of Yaoundé I and Paderborn University and supports the development of new joint research projects.
