2013, Shafir, D., Soifer, H., Bruner, B.D., Dagan, M., Mairesse, Y., Patchkovskii, S., Ivanov, M.Y., Smirnova, O., Dudovich, N.

We probe the dynamics of tunnel ionization via high harmonic generation. We characterize the ionization dynamics in helium atoms, and apply our approach to resolve subtle differences in ionization from different orbitals of a CO 2 molecule.