1. Department of Metrology and Optoelectronics; Faculty of Electronics, Telecommunications and Informatics; Gdańsk University of Technology; Narutowicza Street 11/12 80-233 Gdańsk Poland
2. Department of Optoelectronics; Faculty of Electrical Engineering; Silesian University of Technology; Krzywoustego Street 2 44-100 Gliwice Poland
3. Institute for Materials Research (IMO); Hasselt University; Wetenschapspark 1 B-3590 Diepenbeek Belgium
4. IMOMEC; IMEC vzw; Wetenschapspark 1 B-3590 Diepenbeek Belgium