The division Solid State Optics investigates the modifications of electrical and optical parameters in optical materials, which are caused by the irradiation with high energetic ions.

In praticular we lay focus on the materials lithium niobate and lithium tantalate and the changes of the refractive index, the conductivity and the poling behaviour. The crystals are irradiated at the Bonn Isochronous Cyclotron with normally 40 MeV ³He Ions or 50 MeV alpha particles.