Affiliation: | a Hungarian Academy of Sciences, University of Szeged, Research Group on Laser Physics, Dóm tér 9, H-6720 Szeged, Hungary b Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, H-6720 Szeged, Hungary c Institute of Electronic Structure and Laser (I.E.S.L.), Foundation for Research and Technology-Hellas (F.O.R.T.H.), P.O. Box 1527, GR-711 10 Heraklion, Crete, Greece |