1. Department of Chemistry - Ångström Laboratory Physical Chemistry; Uppsala University; Box 523 75120 Uppsala Sweden
2. Laboratory for Photonics and Interfaces; Institute of Chemical Sciences and Engineering; École Polytechnique de Fédérale de Lausanne; CH-1015 Lausanne Switzerland
3. Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
4. Adolphe Merkle Institute; University of Fribourg; CH-1700 Fribourg Switzerland
5. Department of Applied Physics; Aalto University; P.O. Box 15100 00076 Aalto Finland
6. Laboratory of Photomolecular Science; Institute of Chemical Sciences and Engineering; École Polytechnique Fédérale de Lausanne; CH-1015 Lausanne Switzerland