1. Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
2. Department of Physics, California State University, Chico, Chico, California 95929-0202, United States
3. Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
4. Department of Chemistry, Princeton University, Washington Road, Princeton, New Jersey 08544, United States
5. Department of Chemistry and Biochemistry, and Oregon Center for Optical, Molecular, and Quantum
Science, University of Oregon, Eugene, Oregon 97403, United States