1. National Institute for Research and Development in Microtechnologies-IMT Bucharest, Romania 126A, Erou Iancu Nicolae Str. Voluntari 077190 Romania
2. Center of Materials Technology and Photonics School of Engineering Hellenic Mediterranean University Crete Heraklion 71410 Greece
3. Institute of Electronic Structure and Laser Foundation for Research & Technology-Hellas Crete Heraklion Greece
4. Chemistry Department University of Crete Heraklion Greece
5. Physics Department University of Patras Patras 26500 Greece
6. Physics Department University of Patras Patras 26504 Greece
7. Department of Electrical and Computer Engineering School of Engineering Hellenic Mediterranean University Crete Heraklion 71410 Greece