1. Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Ilfov, RO-77125, Romania
2. Institut de Science des Materiaux
de Mulhouse (IS2M), CNRS UMR7361, 15
Rue Jean Starcky, 68057 Mulhouse, France
3. ERRMECE, Cergy-Pontoise University, 2 Avenue Adolphe Chauvin, 95302 Cergy-Pontoise, France