About the Authors

Lin Han

Affiliation Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America

Hernan G. Garcia

Affiliation Department of Physics, California Institute of Technology, Pasadena, California, United States of America

Seth Blumberg

Affiliation Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America

Kevin B. Towles

Affiliation Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

John F. Beausang

Affiliation Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Philip C. Nelson

Affiliation Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Rob Phillips

phillips@pboc.caltech.edu

Affiliation Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LH RP. Performed the experiments: LH. Analyzed the data: LH HGG KBT PCN RP. Contributed reagents/materials/analysis tools: LH HGG SB KBT JFB PCN. Wrote the paper: LH HGG PCN RP.