1. Laboratory
of Biophysics, Wageningen University, P.O. Box 8128, 6700 ET Wageningen, The Netherlands
2. Department
of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Avenue 9, 10222 Vilnius, Lithuania
3. Department
of Molecular Compound Physics, Institute of Physics, Center for Physical Sciences and Technology, Goštauto 11, 01108 Vilnius, Lithuania
4. MicroSpectroscopy
Centre, Wageningen University, P.O. Box 8128, 6700 ET Wageningen, The Netherlands