Darmstadt 2008 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 26: Poster Ultrakurze Laserpulse

Q 26.4: Poster

Dienstag, 11. März 2008, 16:30–19:00, Poster C1

The impact of the dipole phase on the population dynamics of bound-bound transitions — •Xiao-Tao Xie, Mihai Macovei, Martin Kiffner, and Christoph H. Keitel — Max-Planck-Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany

The dipole phase plays an important role in strong-field processes and determines, e.g., the coherence properties of high-order harmonic radiation [1]. Here we consider the weak-field regime such that tunneling processes and multiphoton ionization are negligible, and investigate the impact of the permanent dipole phase on the population dynamics of bound-bound transitions that are illuminated by a few-cycle pulse. It is shown that the population of the excited states depends on the carrier-envelope phase as well as on the dipole phase. A scheme that allows to determine the dipole phase via the controlled adjustment of the carrier-envelope phase is discussed.

[1] P. Salières, A. L’Huillier, and M. Lewenstein, Phys. Rev. Lett. 74, 3776 (1995).