1 DTU Fotonik, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
2 Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
3 Department of Physics, Bilkent University, 06800 Ankara, Turkey
4 National Research Tomsk Polytechnic University, Institute of Power Engineering, 30 Lenin Avenue, 634050 Tomsk, Russia
5 Department of Electrical and Electronics Engineering, Bilkent University, 06800 Ankara, Turkey
6 Biophotonics Imaging Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
7 Fakult?t für Physik, Universit?t Duisburg-Essen, Lotharstra?e 1, 47048 Duisburg, Germany