1. Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3a, D-30167 Hannover, Germany
2. Laboratory of Nano and Quantum Engineering, Leibniz Universität Hannover, Schneiderberg 39, D-30167 Hannover, Germany
3. Cluster of Excellence PhoenixD, (Photonics, Optics, and Engineering—Innovation Across Disciplines), 30167 Hannover, Germany