https://doi.org/10.1140/epjd/s10053-022-00471-x
Regular Article – Ultraintense and Ultrashort Laser Fields
Orbital-resolved photoelectron momentum distributions of neon atoms in bichromatic elliptically polarized attosecond pulses
1
College of Physics and Electronic Engineering, Northwest Normal University, Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, 730070, Lanzhou, People’s Republic of China
2
College of Physics, Liaoning University, 110036, Shenyang, People’s Republic of China
3
College of Electronic Information Engineering, Lanzhou Institute of Technology, 730050, Lanzhou, People’s Republic of China
4
School of Electronic Engineering, Lanzhou City University, 730070, Lanzhou, People’s Republic of China
Received:
7
March
2022
Accepted:
28
July
2022
Published online:
22
August
2022
We theoretically study the orbital-resolved photoelectron momentum distributions (PMDs) of neon atoms in time-delayed bichromatic elliptically polarized attosecond pulses by numerically solving the two-dimensional time-dependent Schrödinger equation (2D-TDSE). The active electron can reach the continuum state at the same momentum by absorbing 
high-energetic photons or 
low-energetic photons sequentially, and coherent electron wave packets (CEWPs) from these two pathways can interfere with each other. We show the PMDs exhibit an asymmetrical round when the single-photon ionization channel dominates, while spiral structures with the number of arms are 
(
) for the corotating (counter-rotating) scheme. Furthermore, we find that interference patterns in PMDs are sensitive to the amplitude ratio, frequency combinations, dichroism, time delay and ellipticity of bichromatic elliptically polarized attosecond pulses, which offers possibilities for controlling the interference of CEWPs in atoms by shaping the bichromatic elliptically polarized attosecond pulses.
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