Classical aspects in above-threshold ionization with a midinfrared strong laser field.
We present high resolution photoelectron energy spectra of noble gas atoms from high intensity above-threshold ionization (ATI) at midinfrared wavelengths. An unexpected structure at the very low-energy portion of the spectra, in striking contrast to the prediction of the simple-man theory, has been revealed. A semiclassical model calculation is able to reproduce the experimental feature and suggests the prominent role of the Coulomb interaction of the outgoing electron with the parent ion in producing the peculiar structure in long wavelength ATI spectra.
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.
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W
Quan
Z
Z
Lin
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M
Wu
H
H
Kang
H
H
Liu
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Liu
J
J
Chen
J
J
Liu
X T
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He
S G
SG
Chen
H
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Xiong
L
L
Guo
H
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Xu
Y
Y
Fu
Y
Y
Cheng
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Xu