Structure effects in angle-resolved high-order above-threshold ionization of molecules.
We present energy-resolved angular distributions of photoelectrons generated in above-threshold ionization (ATI) of nonaligned diatomic molecules N2 and O2 in high-intensity short laser pulses, with emphasis on the most energetic part of the spectra. The angular distribution for photoelectrons with energy of 10U(p) (U(p): ponderomotive energy), i.e., the plateau cutoff in ATI spectra, is found to be broader in O2 than in N2. Resorting to the analyses from both an S-matrix theory and an intuitive semiclassical model, we attribute the observation to the effect of the ground state molecular orbital structure on high-energy electron emission in strong-field molecular ionization.
Kang
H
H
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.
Quan
W
W
Wang
Y
Y
Lin
Z
Z
Wu
M
M
Liu
H
H
Liu
X
X
Wang
B B
BB
Liu
H J
HJ
Gu
Y Q
YQ
Jia
X Y
XY
Liu
J
J
Chen
J
J
Cheng
Y
Y