Address: Institute for Photonics and Nanotechnologies,CNR - Consiglio Nazionale delle Ricerche

                Laboratorio L-NESS, Politecnico di Milano, sede di Como

                via Anzani 42, 22100 Como, Italy

Phone:    +390313327356

e-mail: monica.bollani@ifn.cnr.it

Address: University of Brescia - Department of Information Engineering 

                    Via Branze 38, 25123 - Brescia, Italy

Phone: +39 030 3715924

e-mail: maria.vincenti@unibs.it

Address: Department of Physics and Astronomy and LENS, University of Florence, Sesto Fiorentino, Italy

Phone:   +390554572499 

E-mail: francesca.intonti@unifi.it