1. Center for Nanophotonics AMOLF Science Park 104 Amsterdam XG 1098 The Netherlands
2. Laboratory of Photonics and Interfaces Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne Lausanne CH‐1015 Switzerland
3. Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany
4. Laboratory of Computational Chemistry and Biochemistry Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne Lausanne CH‐1015 Switzerland
5. Paul Scherrer Institute Forschungsstrasse 111 Villigen CH‐5232 Switzerland
6. Adolphe Merkle Institute University of Fribourg Fribourg CH‐1700 Switzerland