Open AccessHigh harmonic spectra contributed by HOMO-1 orbital of aligned CO_2 molecules
Author(s) -
Jiawei Li,
Peng Liu,
Hua Ye,
Liwei Song,
Shitong Zhao,
Hui Lu,
Ruxin Li,
Zhizhan Xu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.007599
Subject(s) - high harmonic generation , physics , spectral line , harmonic , atomic physics , ionization , homo/lumo , molecular orbital , molecule , molecular physics , surface second harmonic generation , quantum tunnelling , optics , laser , condensed matter physics , quantum mechanics , ion
We observe the high harmonic generation (HHG) from anti-aligned CO(2) molecules when the on-axis peak of HHG from HOMO-2 orbital disappears. The harmonic emission at anti-alignment can be attributed to the contribution of HOMO-1 orbital. Simulations reproduce these observations and reveal the angular distributions of tunneling ionization from HOMO and HOMO-1 respectively at different intensity. The determination of HOMO-1 orbital contributions in harmonic spectra is important for the tomography imaging of aligned molecules and analysis of the time evolved harmonic emission.