1. Center for Materials Science and NanotechnologyUniversitetet i Oslo Gaustadalléen 23A, Kristen Nygaards hus 0373 Oslo Norway
2. Faculty of Physics and Earth SciencesFelix Bloch Institute for Solid State PhysicsUniversität Leipzig Linnéstr. 5 04103 Leipzig Germany
3. Nano Team—Optical MicrocavitiesCRHEA‐CNRS rue Bernard Grégory 06560 Valbonne France