1. University of Jyvaskyla, Department of Physics, Nanoscience
Center, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
2. BioMediTech, University of Tampere, Lääkärinkatu
1, FI-33520 Tampere, Finland
3. Fimlab Laboratories, Biokatu 4, FI-33520 Tampere, Finland
4. Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Strasse 9, Jena 07745, Germany