About the Authors

Joseph K. Jun

Affiliation Department of Physics, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Dezhe Z. Jin

To whom correspondence should be addressed. E-mail: djin@phys.psu.edu

Affiliation Department of Physics, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DJ. Performed the experiments: JJ. Analyzed the data: JJ. Wrote the paper: DJ JJ.