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 P05: Attosecond Light Sources and Their Applications
10:30 AM–12:30 PM,
Thursday, June 6, 2024
Room: 202AB
Chair: James Cryan, SLAC National Accelerator Laboratory
Abstract: P05.00007 : Toward Real-Space Imaging of Electronic Motions with Attosecond X-Ray Scattering*
12:18 PM–12:30 PM
Presenter:
Adi Natan
(SLAC National Accelerator Laboratory)
Author:
Adi Natan
(SLAC National Accelerator Laboratory)
However, this regime introduces complexity in experimental setup and analysis, necessitating a different set of tools than those traditionally employed. This is due to the nature of scattering information, which encompasses both elastic and inelastic scattering and their cross-terms, rendering the simple Fourier relationship between the intensity detected and the charge density invalid.
Here, we outline a methodology for utilizing attosecond hard X-ray scattering to recover electronic charge densities and currents in real space and time from an experimental perspective. We delve into several critical aspects necessary to accomplish a "movie" of electronic motion. These aspects include the application of pump-probe phase tagging through single-shot characterization of attosecond hard X-ray pulses, strategies for controlling the detection bandwidth to highlight scattering from specific electronic states, and methods for distinguishing between densities and currents by leveraging the anisotropy and symmetry properties inherent to the attosecond scattering process. Additionally, we describe an inversion technique required to achieve sub-angstrom resolution in the reconstruction process. Together, these steps facilitate capturing a comprehensive view of electronic coherent motions within molecules, marking a significant advancement in the field of imaging.
*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division.
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