  We examine correlated electron and doubly charged ion momentum spectra from
strong field double ionization of Neon employing intense elliptically polarized
laser pulses. An ellipticity-dependent asymmetry of correlated electron and ion
momentum distributions has been observed. Using a 3D semiclassical model, we
demonstrate that our observations reflect the sub-cycle dynamics of the
recollision process. Our work reveals a general physical picture for
recollision-impact double ionization with elliptical polarization, and
demonstrates the possibility of ultrafast control of the recollision dynamics.
