1. Laboratory for Photonics and Interfaces; Institute of Chemical Sciences and Engineering; École Polytechnique Fédérale de Lausanne; CH-1015- Lausanne Switzerland
2. Adolphe Merkle Institute; University of Fribourg; CH-1700- Fribourg Switzerland
3. Laboratory of Photomolecular Science; Institute of Chemical Sciences and Engineering; École Polytechnique Fédérale de Lausanne; CH-1015- Lausanne Switzerland
4. Helmholtz-Zentrum Berlin für Materialien und Energie; Kekuléstrasse 5 12489 Berlin Germany