1. Department of Metrology and Optoelectronics; Gdansk University of Technology; 11/12 G. Narutowicza Street 80 233 Gdansk Poland
2. Institute of Microelectronics and Optoelectronics; Warsaw University of Technology; Koszykowa 75 00-662 Warsaw Poland
3. Institut für Physik; Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Str. 17489 Greifswald Germany
4. Department of Electrochemistry; Corrosion and Material Engineering; Gdansk University of Technology; 11/12 Narutowicza Street 80 233 Gdansk Poland