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Journal Article

Light-induced states in the transient-absorption spectrum of a periodically pumped strong-field-excited system

MPS-Authors

Haug,  Juliane
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Cavaletto,  Stefano M.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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1810.09210.pdf
(Preprint), 3MB

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Citation

Haug, J., & Cavaletto, S. M. (2019). Light-induced states in the transient-absorption spectrum of a periodically pumped strong-field-excited system. Physical Review A, 99(1): 013434. doi:10.1103/PhysRevA.99.013434.


Cite as: http://hdl.handle.net/21.11116/0000-0003-0EF1-E
Abstract
The transient-absorption spectrum of a $V$-type three-level system is investigated, when this is periodically excited by a train of equally spaced, $\delta$-like pump pulses as, e.g., from an optical-frequency-comb laser. We show that, even though the probe pulse is not assumed to be much shorter than the pump pulses, light-induced states appear in the absorption spectrum. The frequency- and time-delay-dependent features of the absorption spectra are investigated as a function of several laser control parameters, such as the number of pump pulses used, their pulse area, and the pulse-to-pulse phase shift. We show that the frequencies of the light-induced states and the time-delay-dependent features of the spectra contain information on the action of the intense pulses exciting the system, which can thus complement the information on light-imposed amplitude and phase changes encoded in the absorption line shapes.