1. Department
of Electrical Engineering, Stanford University, Stanford, California 94305, United States
2. Horiba Scientific, Novato, California 94949, United States
3. Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
4. Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
5. SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
6. Material
Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
7. Precourt
Institute for Energy, Stanford University, Stanford, California 94305, United States