Resolving Quantum Interference Black Box through Attosecond Photoionization Spectroscopy

作者：Jiang, Wenyu; Armstrong, Gregory S. J.; Han, Lulu; Xu, Yidan; Zuo, Zitan; Tong, Jihong; Lu, Peifen; Dahlstrom, Jan Marcus; Ueda, Kiyoshi; Brown, Andrew C.^*; van der Hart, Hugo W.; Gong, Xiaochun; Wu, Jian

来源：Physical Review Letters, 2023, 131(20): 203201.

DOI：10.1103/PhysRevLett.131.203201

• ELECTRON LOCALIZATION
• MOMENTUM SPECTROSCOPY
• RECOIL-ION
• DELAY
• DYNAMICS
• MATRIX

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 polarizationcontrolled 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 angledependent 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 p - d - p and p - s - p 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.

• 单位
  1; 中国科学院