1. Laboratory for Photomolecular Science,
Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1015-Lausanne, Switzerland
2. Department of Chemistry—Ångström
Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
3. Department of Engineering
Sciences, Solid State Physics, Uppsala University, Box 534, 75121 Uppsala, Sweden