Author Affiliations +
Mihai Stafe,1 Georgiana C. Vasile,1 Aurelian A. Popescu,2 Dan Savastru,2 Laurentiu Baschir,2 Mona Mihailescu,1 Constantin Negutu,1 Niculae N. Puscas1
1Politehnica Univ. of Bucharest (Romania)
2National Institute of Research and Development for Optoelectronics (Romania)