1. Chair for Photonics and Optoelectronics Nano‐Institute Munich and Department of Physics Ludwig‐Maximilians‐Universität (LMU) Königinstr. 10 80539 Munich Germany
2. Department of Materials Science and Engineering and the Russell Berrie Nanotechnology Institute Technion – Israel Institute of Technology Haifa 32000 Israel
3. The Nancy and Stephen Grand Technion Energy Program Technion − Israel Institute of Technology Haifa 3200003 Israel