1. Jason L. Choy Laboratory of Single-Molecule Biophysics, University of California, Berkeley, California 94720, United States
2. Howard Hughes Medical Institute, University of California, Berkeley, California 94720, United States
3. California Institute for Quantitative Biosciences, QB3, University of California, Berkeley, California 94720, United States
4. Laboratoire Photonique Numérique et Nanosciences, LP2N UMR 5298, Université de Bordeaux, Institut d’Optique, CNRS, F-33400 Talence, France
5. Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States