1. Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
2. Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
3. WCZT, Adam Mickiewicz University, Umultowska 89C, 61-614 Poznań, Poland