1. Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
2. Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
3. ITMO University, 199034 St. Petersburg, Russia
4. St. Petersburg State Institute of Technology, 190013 St. Petersburg, Russia
5. Spin Optics Laboratory, St. Petersburg State University, 198504 St. Petersburg, Russia