Affiliation: | a Department of Chemistry, University of Waterloo, Waterloo, Ont., Canada N2L 3G1 b Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA c Department of Physics and Astronomy, University College London, London WC1E 6BT, UK d Institute of Applied Physics, Russian Academy of Science, Uljanov Street 46, Nizhnii Novgorod 603950, Russia |