About the Authors

Yihai Yu

Affiliation Department of Physics, George Washington University, Washington, D.C., United States of America

Guanyu Wang

Affiliation Department of Physics, George Washington University, Washington, D.C., United States of America

Rahul Simha

Affiliation Department of Computer Sciences, George Washington University, Washington, D.C., United States of America

Weiqun Peng

Affiliation Department of Physics, George Washington University, Washington, D.C., United States of America

Frank Turano

Affiliation Department of Biological Sciences, George Washington University, Washington, D.C., United States of America

Chen Zeng

To whom correspondence should be addressed. E-mail: chenz@gwu.edu

Affiliation Department of Physics, George Washington University, Washington, D.C., United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

YY, GW, RS, WP, FT, and CZ conceived and designed the experiments. YY and GW performed the experiments and analyzed the data. YY, GW, RS, WP, and CZ wrote the paper.