1. Solid State Electronics, The Ångström Laboratory, Uppsala University, SE-75121 Uppsala, Sweden
2. SEG-CEMUC—Department of Mechanical Engineering, University of Coimbra, Rua Luis Reis Santos, 3030-788 Coimbra, Portugal
3. SC MGM STAR CONSTRUCT SRL, 7 Pancota St., Bucharest 022773, Romania
4. National Institute of Research and Development for Optoelectronics—INOE 2000, 409 Atomistilor St., P.O. Box MG 05, Magurele-Bucharest 077125, Romania