Paulo Sérgio André,
, Portugal
Jose M. Baptista,
Faculty of Exact Sciences and Engineering, University of Madeira, Portugal
Paulo Caldas,
Instituto Politécnico de Viana Do Castelo, Portugal
Rogério N. Nogueira,
Independent Researcher, Portugal
Rosa A. Perez Herrera,
Universidad Publica de Navarra, Spain
Susana Silva,
Center for Applied Photonics,, Portugal