1. Institute for Optics and Atomic Physics, Technical University of Berlin, Berlin 10623, Germany
2. Helmholtz-Zentrum Berlin for Materials and Energy, Berlin 12489, Germany
3. Physikalisch-Technische Bundesanstalt, National Metrology Institute, Berlin 10587, Germany
4. Federal Institute for Materials Research and Testing (BAM), Berlin 12489, Germany
5. August Storck KG, Berlin 13403, Germany
6. Institute of Food Technology and Food Chemistry, Technical University of Berlin, Berlin 13355, Germany