1. Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448,
F-63000 Clermont-Ferrand, France
2. CNRS, UMR 6602, IP, F-63177 Aubière, France
3. St. Petersburg Academic University, Khlopina 8/3, 194021 St. Petersburg, Russia
4. Ioffe Physical Technical Institute of the Russian Academy of Sciences, Polytekhnicheskaya 26, 194021 St. Petersburg, Russia
5. St. Petersburg State University (Physical Faculty), Ulianovskaya Street 3, Petrodvorets, 198504 St. Petersburg, Russia
6. Université de Toulon, IM2NP, Bât.R, B.P.20132, 83957 La Garde Cedex, France
7. CNRS, UMR 7334, 83957 La Garde Cedex, France
8. Clermont Université, Université d’Auvergne, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France
9. CNRS-LPN, Route de Nozay, 91460 Marcoussis, France