  Non-adiabatic photo-ionization is difficult to control as it relies on the
derivatives of the envelope and not on phase-details of the short ionizing
pulse. Here, we introduce a catalyzing state, whose presence render
non-adiabatic ionization sensitive to phase-details of tailored pulses. Since a
catalyzing state is in general easy to create, this opens a perspective for
coherent control of ultra-fast ionization.
