1. Institute of Applied Physics Karlsruhe Institute of Technology (KIT) Campus South 76131 Karlsruhe Germany
2. Material Research Center for Energy Systems (MZE) KIT Campus South 76131 Karlsruhe Germany
3. Integrated Systems Laboratory, Swiss Federal Institute of Technology in Zurich Zürich 8092 Switzerland
4. Institute of Electromagnetic Fields Swiss Federal Institute of Technology in Zurich Zürich 8092 Switzerland
5. Institute of Applied Physics KIT Campus South 76131 Karlsruhe Germany
6. Institute of Nanotechnology KIT Campus North 76344 Eggenstein‐Leopoldhafen Germany
7. MZE KIT Campus South 76131 Karlsruhe Germany