Karolina Słowik phone: +48 56 611 3329 e-mail: karolina@fizyka.umk.pl room 477a Andrzej Gajewski phone: +48 56 611 3298 e-mail: gajewski@doktorant.umk.pl room 484 Miriam Kosik phone: +48 56 611 3298 e-mail: 252621@stud.umk.pl room 484 Nicolaus Copernicus University, Institute of Physics, Department of Quantum Physics, Grudziadzka 5/7 87-100 Torun