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Journal articles
Phase-resolved two-dimensional spectroscopy of electronic wave packets by laser-induced XUV free induction decay
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.
https://hal-cea.archives-ouvertes.fr/cea-01506825
Contributor : Caroline Lebe <>
Submitted on : Wednesday, April 12, 2017 - 11:50:36 AM
Last modification on : Monday, December 7, 2020 - 7:48:01 AM
Contributor : Caroline Lebe <>
Submitted on : Wednesday, April 12, 2017 - 11:50:36 AM
Last modification on : Monday, December 7, 2020 - 7:48:01 AM
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