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