Year: 2017
Author: Shengjun Yue, Hongchuan Du, Hongmei Wu, Jinbin Li, Shengwei Yue, Bitao Hu
Journal of Atomic and Molecular Sciences, Vol. 8 (2017), Iss. 1 : pp. 10–17
Abstract
The high-order harmonic generation (HHG) has attracted much attention due to its wide application in attosecond science in last decades. The selection rules have also been broadly studied in experiments and theories since they play an important role in HHG. In this review, we give an overview of recent developments on selection rules of HHG from atoms to molecules. For targets with rotational symmetries, if the rotational symmetries of targets and laser pulses are the M-fold (the projective symmetry on the laser polarization plane) and L-fold, the selection rules are Nk ± 1, where N is the the greatest common divisor of M and L. However, for asymmetric molecules in non-Born-Oppenheimer approximation, the situation is more complicated, where the nuclear dipole acceleration can produce even harmonics, but it is three orders lower than that of the electron. Hence, the HHG is mainly relied on the electronic dipole acceleration. In this case, the broken degree of system-symmetry dominates the generation of even-order harmonics.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.042017.061517a
Journal of Atomic and Molecular Sciences, Vol. 8 (2017), Iss. 1 : pp. 10–17
Published online: 2017-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 8
Keywords: --