About the Authors

Oliver Nagel

Affiliation Institute of Physics und Astronomy, University of Potsdam, Potsdam, Germany

Can Guven

Affiliation Department of Physics, University of Maryland, College Park, Maryland, United States of America

Matthias Theves

Affiliation Institute of Physics und Astronomy, University of Potsdam, Potsdam, Germany

Meghan Driscoll

Affiliation Department of Physics, University of Maryland, College Park, Maryland, United States of America

Wolfgang Losert

Affiliation Department of Physics, University of Maryland, College Park, Maryland, United States of America

Carsten Beta

*beta@uni-potsdam.de

Affiliation Institute of Physics und Astronomy, University of Potsdam, Potsdam, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CB WL. Performed the experiments: ON. Analyzed the data: ON CG. Contributed reagents/materials/analysis tools: CG MD MT. Wrote the paper: CB CG.