1. Department of Sustainable Systems Engineering (INATECH) University of Freiburg Emmy-Noether-Straße 2 Freiburg 79110 Germany
2. NVision Imaging Technologies GmbH Albert-Einstein-Allee 11 Ulm 89081 Germany
3. Department for Technology Fraunhofer Institute for Applied Solid State Physics (IAF) Tullastraße 72 Freiburg 79108 Germany
4. Department for Quantum Technology Fraunhofer Institute for Applied Solid State Physics (IAF) Tullastraße 72 Freiburg 79108 Germany