In this contribution we experimentally demonstrate 100% population transfer in an atomic model system. In a three-step ladder in rubidium we achieved full population transfer from the electronic ground state (5s) to the final state 5d. As a next step towards molecular dissociation we performed experiments on multiphoton ionization of Rydberg atoms with a FIR free electron laser, and observed four-photon ionization in which all intermediate steps are resonant.

Cham: Springer
P. F. Barbara , W. H. Knox , G. A. Mourou , A. H. Zewail

Noordam, L. D, Balling, P, Broers, B, Hoogenraad, J. H, Maas, D. J, van Amersfoort, P. W, … Vrijen, R. B. (1994). Climbing a ladder system by frequency-chirped laser pulses. In P. F Barbara, W. H Knox, G. A Mourou, & A. H Zewail (Eds.), Ultrafast Phenomena IX : Proceedings of the 9th International Conference, Dana Point, CA, May 2-6,1994 (pp. 223–227). Cham: Springer.