1. Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
2. Department of Chemistry, Columbia University, New York, New York 10027, United States
3. The Institute of Optics, Hajim School of Engineering, University of Rochester, Rochester, New York 14627, United States
4. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, United States
5. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States