About the Authors

Christoph A. Haselwandter

cah77@usc.edu (CAH); phillips@pboc.caltech.edu (RP)

Affiliations Department of Physics and Astronomy, University of Southern California, Los Angeles, California, United States of America, Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America

Rob Phillips

cah77@usc.edu (CAH); phillips@pboc.caltech.edu (RP)

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: CAH RP. Performed the experiments: CAH. Analyzed the data: CAH RP. Wrote the paper: CAH RP.