1. Department of Physics, Department of Chemistry and Biochemistry, Programs of Biophysics, Chemical Physics, and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
2. City of Hope National Cancer Center, 1500 East Duarte Road, Duarte, California 91010, United States
3. Center for Ultrafast Science and Technology, School of Chemsitry and Chemical Engineering, School of Physics and Astronomy, Shanghai Jiao Tong Unversity, Shanghai 200240, China