1. Lab for Photophysics of Media with Nanoobjects, Vavilov State Optical Institute, Kadetskaya Liniya V.O., Dom 5, Korpus 2, St. Petersburg 199053, Russia
2. Saint-Petersburg Electrotechnical University “LETI”, Prof. Popova Street, Dom 5, St. Petersburg 197376, Russia
3. Laboratoire de Chimie, UMR CNRS 5182, Ecole Normale Supérieure de Lyon, France