[1] Univ Ghent, IMEC, Dept Informat Technol, Photon Res Grp, B-9000 Ghent, Belgium
[2] Univ Ghent, Dept Mol Biotechnol, B-9000 Ghent, Belgium
[3] Univ Ghent, Ctr Nano & Biophoton NB Photon, B-9000 Ghent, Belgium
[4] RAS, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
[5] Saratov NG Chernyshevskii State Univ, Inst Nanostruct & Biosyst, Saratov 410012, Russia
[6] Max Planck Inst Colloids & Interfaces, D-14476 Potsdam, Germany
[7] Jacobs Univ Bremen, Sch Sci & Engn, D-28759 Bremen, Germany