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Accumulation effects in a multi-level atom excited by a train of ultrashort pulses

Nataša Vujičić, Damir Aumiler, Ticijana Ban +1 more

Oct 21, 20100 citations

Coherent Excitation of Two-Level Atoms by Pulse Trains

Nikolay V. Vitanov, P. L. Knight

Springer eBooksJan 1, 19960 citations

Cancellation of the coherent accumulation in rubidium atoms excited by a train of femtosecond pulses

Ticijana Ban, Damir Aumiler, Hrvoje Skenderović +3 more

Springer series in chemical physicsJan 1, 20095 citations

The decay dynamics of a slab of two-level atoms excited by an ultrashort resonant pulse

Richard M. Friedberg, Jamal T. Manassah

Optics CommunicationsApr 16, 200818 citations

Influence of propagation on the coherent accumulation of excitation induced by an ultrashort pulse train

Antônio Augusto Soares, Luı́s E. E. de Araujo

We study the effects of propagation through an extended sample of two- and three-level atoms on the coherent accumulation of excitation by an ultrashort pulse train. In the two-level case, previous pulses in the train may prepare the medium such that a later pulse may experience amplification and absorption in different positions inside the sample. For a large number of pulses, the atomic medium may be saturated by the train, and some pulses propagate without experiencing either absorption or amplification. In general, absorption of the resonant pulse frequency during propagation compromises the accumulation efficiency. In the three-level case, the coherent accumulation of excitation leads to electromagnetically induced transparency of the pulse train, and the pulses exit the medium without any distortion in their temporal profile.We study the effects of propagation through an extended sample of two- and three-level atoms on the coherent accumulation of excitation by an ultrashort pulse train. In the two-level case, previous pulses in the train may prepare the medium such that a later pulse may experience amplification and absorption in different positions inside the sample. For a large number of pulses, the atomic medium may be saturated by the train, and some pulses propagate without experiencing either absorption or amplification. In general, absorption of the resonant pulse frequency during propagation compromises the accumulation efficiency. In the three-level case, the coherent accumulation of excitation leads to electromagnetically induced transparency of the pulse train, and the pulses exit the medium without any distortion in their temporal profile.

Physical Review AJul 29, 200910 citations

Coherent accumulation of excitation in the electromagnetically induced transparency of an ultrashort pulse train

Antônio Augusto Soares, Luı́s E. E. de Araujo

We investigate the excitation of an atomic degenerate-$\ensuremath{\Lambda}$ system by a train of ultrashort pulses. An iterative analytic solution to the optical Bloch equations is found describing the temporal evolution of the density matrix elements. We show that electromagnetically induced transparency of the excitation pulses develops through the coherent accumulation of excitation (population and coherence) between the degenerate lower states. The influence of the pulse train parameters (area, repetition period, and phase between successive pulses) on establishing the transparency is investigated.We investigate the excitation of an atomic degenerate-$\ensuremath{\Lambda}$ system by a train of ultrashort pulses. An iterative analytic solution to the optical Bloch equations is found describing the temporal evolution of the density matrix elements. We show that electromagnetically induced transparency of the excitation pulses develops through the coherent accumulation of excitation (population and coherence) between the degenerate lower states. The influence of the pulse train parameters (area, repetition period, and phase between successive pulses) on establishing the transparency is investigated.

Physical Review AOct 15, 200727 citations

Coherent accumulation in two-level atoms excited by a train of ultrashort pulses

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