Origin of the Phase Lag in the Coherent Control of Photoionization and Photodissociation

Jeanette A. Fiss, Langchi Zhu, Robert J. Gordon, Tamar Seideman
1999 Physical Review Letters  
The phase lag associated with coherent control by two-pathway excitation in the presence of autoionizing and /or predissociating resonances is studied experimentally and theoretically. For a mixture of HI and DI, the phase lag Dd between the two-parent ion signals vanishes to within experimental accuracy, whereas for an HI͞H 2 S mixture, jDdj reaches a maximum in the vicinity of the HI 5ss resonance. These and previous observations are all explained within a single theoretical model which
more » ... l model which clarifies the origins of the phase lag in different atomic and molecular systems. [S0031-9007(98)08101-0]
doi:10.1103/physrevlett.82.65 fatcat:iipa4f2k55hmzejfznodqyp5fe