  Recollision physics and attosecond pulse generation meld the precision of
optics with collision physics. As a follow-up to our previous work, we reveal a
new direction for the study of electronic structure and multielectron dynamics
by exploiting the collision-physics nature of recollision. We show
experimentally that, by perturbing recollision trajectories with an infrared
field, photorecombination time delays can be measured entirely optically using
the Cooper minimum in argon as an example. In doing so, we demonstrate the
relationship between recollision trajectories and the transition moment
coupling the ground and continuum states. In particular, we show that
recollision trajectories are influenced by their parent ion, while it is
commonly assumed they are not. Our work paves the way for the entirely optical
measurement of ultrafast electron dynamics and photorecombination delays due to
electronic structure, multielectron interaction, and strong-field driven
dynamics in complex molecular systems and correlated solid-state systems.
