1. Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P. O. Box 541 Tampere FI 33101 Finland
2. Photonic Nanostructure Facility; Institute of Experimental Physics; Faculty of Physics; University of Warsaw; ul. Pasteura 5 Warsaw 02-093 Poland
3. Department and Clinic of Ophthalmology; Wrocław Medical University; ul. Borowska 213 Wrocław 50-556 Poland