Phase-resolved two-dimensional spectroscopy of electronic wave packets by laser-induced XUV free induction decay - Archive ouverte HAL Access content directly
Journal Articles Physical Review A : Atomic, molecular, and optical physics Year : 2017

Phase-resolved two-dimensional spectroscopy of electronic wave packets by laser-induced XUV free induction decay

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Abstract

We present a time- and phase-resolved, background-free scheme to study the extreme ultraviolet dipole emission of a bound electronic wave packet, without the use of any extreme ultraviolet exciting pulse. Using multiphoton transitions, we populate a superposition of quantum states which coherently emit extreme ultraviolet radiation through free induction decay. This emission is probed and controlled, both in amplitude and phase, by a time-delayed infrared femtosecond pulse. We directly measure the laser-induced dephasing of the emission by using a simple heterodyne detection scheme based on two-source interferometry. This technique provides rich information about the interplay between the laser field and the Coulombic potential on the excited electron dynamics. Its background-free nature enables us to use a large range of gas pressures and to reveal the influence of collisions in the relaxation process.

Dates and versions

cea-01506825 , version 1 (12-04-2017)

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Cite

S. Beaulieu, E. Bloch, L. Barreau, A. Comby, D. Descamps, et al.. Phase-resolved two-dimensional spectroscopy of electronic wave packets by laser-induced XUV free induction decay. Physical Review A : Atomic, molecular, and optical physics, 2017, 95, pp.041401. ⟨10.1103/PhysRevA.95.041401⟩. ⟨cea-01506825⟩
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