1. The Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion−Israel Institute of Technology, Haifa 32000, Israel
2. Institute of Photonic Technology e.V., Albert-Einstein-Straße 9, 07745 Jena, Germany
3. Max-Planck-Institute for the Science of Light, Günther-Scharowsky-Straße 1, 91058 Erlangen, Germany