My research focus is to take effects of topological protection known from solid state physics (such as the Quantum Hall or Quantum spin Hall effect) and to bring them to photonic systems. In particular, we have realized the first topological insulator for hybrid light-matter particles: exciton-polaritons. This platform promises unique novel features, new many-body effects and quantum-coherent phenomena in this symbiotic light-matter system. Furthermore, we work on technological implementations of semiconductor based Topological Lasers and Exceptional Point Sensors.