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The modelling of field ionization in particle-in-cell(PIC) codes is an important prerequisite toanalyzing high-power laser-matter interaction. Many field ionization models exist that havepredictive capability at non-relativistic laser intensities and for laser pulse durations muchlonger than atomic time scales. Additionally many PIC codes exist which are operating on largeCPU machines and already take field ionization into account. This thesis will take a step tomodel field ionization on new, highly parallel GPU architectures. Recently these architecturesare increasingly applied to large scale scientific simulations for their raw computing power.The modelling of field ionization proves to be challenging on GPGPUs and theextended aim of this thesis is to employ techniques to verify that implementation. Difficulties inabiding by the constrains of the models themselves, the PIC algorithm as well as the plasmadynamics will be pointed out. Nevertheless PIConGPU, the fastest fully relativistic particle-in-cell code in existence, now provides an ionization framework by which new and exciting physicalproblems can be tackled

Modellierung und Validierung von Feldionisation in parallelen Particle-in-Cell-Codes