Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session K00: Poster Session II (4pm-6pm CDT)
4:00 PM,
Wednesday, June 5, 2024
Room: Hall BC
Abstract: K00.00041 : Self-referenced interferometric harmonic spectroscopy for coherent electron dynamics imaging and reconstruction of attosecond pulse trains*
Presenter:
R. Esteban Goetz
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
Authors:
R. Esteban Goetz
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
Geoffrey R Harrison
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
Tobias Saule
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
George N Gibson
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
Carlos A Trallero
(Department of Physics, University of Connecticut, Storrs, 06269 Connecticut, USA)
Anh-Thu Le
(Department of Physics, University of connecticut, Storrs, 06269, Connecticut, USA)
In contrast to ATAS which gives access to the imaginary part of the refractive index through an absorption measurement, the interferometric technique of Ref. [1] gives information of its real part. Moreover, the narrow bandwidth centered around the central frequencies of the ATP allows to isolate the contributions from different target states to the refractive index as well as resolve the intertwined interference pathways being probed by a relatively weak delayed IR pulse. In analogy to the RABBITT scheme, changes in the ATP phases modify the relative phases of the different dynamical pathways and, therefore, our approach can be used for APT pulse characterization from the interference fringe measurements. Alternatively, the interference fringe measurements can be exploited to probe the underlying quantum dynamics, which is confirmed by an excellent agreement between third-order perturbation theory and the non-perturbative calculations. We incorporate macroscopic and field propagation effects by solving the Maxwell equations for the ATP and IR laser inside the samples in the scalar field approximation and beyond Beer’s law.
*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award Number DE-SC0023192.
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