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Effects Of Coherent Coupling Of Autoionizing States On Multiphoton Ionization, N. E. Karapanagioti, D. Charalambidis, Cornelis J. Uiterwaal, C. Fotakis, H. Bachau, I. Sanchez, E. Cormier

C.J.G.J. Uiterwaal Publications

We present the experimental and theoretical investigation of the effects of the strong electromagnetic coupling of two autoionizing states (AIS’s) on the photoionization properties of an atomic system. These effects are observed by probing the ladder system from the ground state of the atom through a weak two-photon transition to the region of the lower AIS. The experimental observation of the modification of the total ionization and partial photoelectron spectra at different wavelengths of the coupling and probe lasers are accurately reproduced by a theoretical analysis which uses a density-matrix approach. Both theory and experiment indicate a strong inhibition of …