Rescattering of ultralow-energy electrons for single ionization of Ne in the tunneling regime -: art. no. 113002

Electron emission for single ionization of Ne by 25 fs, 1.0 PW/cm(2) laser pulses at 800 nm has been investigated in a kinematically complete experiment using a reaction microscope. Mapping the complete final state momentum space with high resolution, a distinct local minimum is observed at P-eparallel to=0, where P-eparallel to is the electron momentum parallel to the laser polarization. Whereas tunneling theory predicts a maximum at zero momentum, our findings are in good agreement with recent semiclassical predictions which were interpreted to be due to recollision.