1. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
2. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
3. Department of Materials Science and Engineering and Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
4. Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California 94720, United States
5. Department of Applied Physics, Stanford University, Stanford, California 94305, United States
6. The PULSE Institute for Ultrafast Energy Science, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
7. Department of Photon Science, Stanford University and SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States