1. Department of Chemistry, San José State University, San José, California 95192, United States
2. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
3. Department of Physics, Stanford University, Palo Alto, California 94025, United States
4. The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
5. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
6. Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland 90014
7. Quantum Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, United States