Multiphoton Femtosecond Coherent Control in the Single-Cycle Regime

Details Multiphoton Femtosecond Coherent Control in the Single-Cycle Regime Multiphoton Femtosecond Coherent Control in the Single-Cycle Regime

2009-10-20

arxiv.org/abs/0910.3783v1

Physics

Atomic Physics

Scientific paper

Coherent control of the atomic two-photon absorption with shaped single-cycle pulses is examined theoretically in the weak-field regime. The control over the stabilized carrier-envelope phase (CEP) of the pulses is determined as a key parameter allowing the full utilization of the ultrabroad pulse spectrum. This bandwidth is sufficient to provide besides the sequential two-photon pathways, additional Raman-type pathways coupling between the ground and the excited states. The interference between the different pathways is efficiently controlled via the control over the CEP. Simplified two-level model is analyzed in the frequency domain where the rational pulse shaping is applied. The developed intuition is applied to atomic Cs and verified by the exact numerical solution of time-dependent Schrodinger equation.

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