1. Technische Physik, Institute of Nanostructure Technologies and Analytics, Center of Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
2. Computational Electronics and Photonics Group, CINSaT, Wilhelmshöher Allee 71, University of Kassel, 34121 Kassel, Germany
3. Electrical Engineering Department and Russell Berrie Nanotechnology Institute, Technion, Haifa 32000, Israel