1. Department of Physics, JILA, and STROBE NSF Science & Technology Center, University of Colorado and NIST, Boulder, Colorado 80309, United States
2. Renewable and Sustainable Energy Institute and the Materials Science & Engineering Program, University of Colorado, Boulder, Colorado 80309, United States
3. Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
4. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
5. KMLabs Incorporated, 4775 Walnut Street, Building 102, Boulder, Colorado 80301, United States