We study experimentally the ionization of argon atoms by a train of attosecond pulses in the presence of a strong infrared laser field, using a velocity map imaging technique. The recorded momentum distribution strongly depends on the delay between the attosecond pulses and the laser field. We interpret the interference patterns observed for different delays using numerical and analytical calculations within the strong field approximation.

J. Phys. B

Johnsson, P., Mauritsson, J., Remetter, T., Ruchon, T., Ni, Y., Lépine, F., … L'Huillier, A. (2006). Angularly resolved electron wave packet interferences. J. Phys. B: At., Mol. Opt. Phys., 39, 3983–3991. doi:10.1088/0953-4075/39/18/026