Exploiting attosecond light pulses it is now possible to observe in time visible and near-infrared pulses with a complex polarization states.

“Space–time control of free induction decay in the extreme ultraviolet”
S. Bengtsson, E.W.Larsen, D. Kroon, S.Camp, M.Miranda, C.L.Arnold, A.L’Huillier, K. J. Schafer, M.B.Gaarde, L.Rippe and J. Mauritsson