Resolving Quantum Interference Black Box through Attosecond Photoionization Spectroscopy.
Phys Rev Lett
; 131(20): 203201, 2023 Nov 17.
Article
en En
| MEDLINE
| ID: mdl-38039486
ABSTRACT
Multiphoton light-matter interactions invoke a so-called "black box" in which the experimental observations contain the quantum interference between multiple pathways. Here, we employ polarization-controlled attosecond photoelectron metrology with a partial wave manipulator to deduce the pathway interference within this quantum 'black box" for the two-photon ionization of neon atoms. The angle-dependent and attosecond time-resolved photoelectron spectra are measured across a broad energy range. Two-photon phase shifts for each partial wave are reconstructed through the comprehensive analysis of these photoelectron spectra. We resolve the quantum interference between the degenerate pâdâp and pâsâp two-photon ionization pathways, in agreement with our theoretical simulations. Our approach thus provides an attosecond time-resolved microscope to look inside the "black box" of pathway interference in ultrafast dynamics of atoms, molecules, and condensed matter.
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2023
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Article
País de afiliación:
China