Temporal coherent control in the photoionization of Cs2: Theory and experiment
| Autor: | Valérie Blanchet, M. A. Bouchene, Bertrand Girard |
|---|---|
| Přispěvatelé: | Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées |
| Rok vydání: | 1998 |
| Předmět: |
Physics
010304 chemical physics Oscillation Wave packet [PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] General Physics and Astronomy Photoionization 01 natural sciences Superposition principle Coherent control Ionization 0103 physical sciences Quantum system Physical and Theoretical Chemistry Atomic physics 010306 general physics Envelope (waves) |
| Zdroj: | Journal of Chemical Physics Journal of Chemical Physics, American Institute of Physics, 1998, 108 (12), pp.4862-4876. ⟨10.1063/1.475896⟩ |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | International audience; Two identical femtosecond pulses are used to create a coherent superposition of two vibrational wave packets in a bound electronic state of cesium dimers. The oscillations of these two wave packets are further detected after photoionization of the system. Quantum interferences between the two wave packets result in a temporal coherent control of the ionization probability. The interferogram exhibits the following features as a function of the time delay between the two laser pulses: high-frequency oscillation corresponding to Ramsey fringes (at the Bohr frequency of the transition) modulated by a slow envelope corresponding to the oscillations of vibrational wave packets (vibrational recurrences). Here the control parameter is the time delay between the two laser pulses which can be used to control the preparation of a wave packet in a quantum system and monitor its evolution. The detailed theory of this experiment is presented and compared with the pump-probe experiment, The temporal coherent control experiment is performed in the B state of Cs-2, at 768 nm, with 150 fs pulses. We finally analyze quantitatively and discuss the effects of a thermal distribution of initial states on the temporal coherent control signal. (C) 1997 American Institute of Physics. |
| Databáze: | OpenAIRE |
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