About the Authors

Rodrigo Publio

rpublio@me.com

Affiliation Department of Physics, FFCLRP, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil

Cesar Celis Ceballos

Affiliation Department of Physics, FFCLRP, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil

Antonio C. Roque

Affiliation Department of Physics, FFCLRP, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RP ACR. Performed the experiments: RP CCC. Analyzed the data: RP CCC. Contributed reagents/materials/analysis tools: RP ACR CCC. Wrote the paper: RP ACR.