About the Authors
- Marco Leo
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* E-mail: marco.leo@cnr.it
Affiliation National Research Council of Italy, Institute of Optics, Arnesano, Lecce, Italy
- Dario Cazzato
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Affiliations National Research Council of Italy, Institute of Optics, Arnesano, Lecce, Italy, Faculty of Engineering, University of Salento, Lecce, Italy
- Tommaso De Marco
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Affiliation National Research Council of Italy, Institute of Optics, Arnesano, Lecce, Italy
- Cosimo Distante
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Affiliation National Research Council of Italy, Institute of Optics, Arnesano, Lecce, Italy
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: ML TDM. Performed the experiments: ML DC. Analyzed the data: CD. Wrote the paper: ML.