1. Centre for Plasma and Laser Engineering The Szewalski Institute of Fluid−Flow Machinery Polish Academy of Sciences 80-231 Gdańsk Poland
2. Department of Metrology and Optoelectronics Faculty of Electronics, Telecommunications and Informatics Gdańsk University of Technology 80-233 Gdańsk Poland
3. Faculty of Applied Physics and Mathematics Institute of Nanotechnology and Materials Engineering Gdańsk University of Technology 80-233 Gdańsk Poland