4.8 Article

Disentangling Intracycle Interferences in Photoelectron Momentum Distributions Using Orthogonal Two-Color Laser Fields

Journal

PHYSICAL REVIEW LETTERS
Volume 119, Issue 24, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.243201

Keywords

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Funding

  1. Austrian Science Fund (FWF) [P28475-N27, P25615-N27, P21463-N22, SFB-F49 NEXTlite]
  2. National Basic Research Program of China [2013CB922201]
  3. National Natural Science Foundation of China [11334009, 11474321]
  4. National Science and Engineering Research Council [419092-2013-RGPIN]
  5. Chinese Scholarship Council
  6. Austrian Science Fund (FWF) [P28475] Funding Source: Austrian Science Fund (FWF)

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We use orthogonally polarized two-color (OTC) laser pulses to separate quantum paths in the multiphoton ionization of Ar atoms. Our OTC pulses consist of 400 and 800 nm light at a relative intensity ratio of 10:1. We find a hitherto unobserved interference in the photoelectron momentum distribution, which exhibits a strong dependence on the relative phase of the OTC pulse. Analysis of model calculations reveals that the interference is caused by quantum pathways from nonadjacent quarter cycles.

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