1. Laser Research Center, Vilnius University 1 , Saulėtekio 10, Vilnius LT-10223, Lithuania
2. Institute of Quantum Optics, Leibniz University Hannover 2 , Welfengarten 1, 30167 Hannover, Germany
3. Max Born Institute 3 , Max-Born-Strasse 2a, 10117 Berlin, Germany
4. Cluster of Excellence PhoenixD 4 , Welfengarten 1, 30167 Hannover, Germany