Carrier envelope phase effect on the spatial distribution of high-order harmonic generation in asymmetric molecule |
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| Affiliation: | Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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| Abstract: | The spatial distribution in high-order harmonic generation (HHG) from the asymmetric diatomic molecule HeH2+ is investigated by numerically solving the non-Born-Oppenheimer time-dependent Schrödinger equation (TDSE). The spatial distribution of the HHG spectra shows that there is little contribution in HHG around the geometric center of two nuclei (z = 1.17 a.u.) and the equilibrium internuclear position of the H nucleus (z = 3.11 a.u.). We demonstrate the carrier envelope phase (CEP) effect on the spatial distribution of HHG in a few-cycle laser pulse. The HHG process is investigated by the time evolution of the electronic density distribution. The time-frequency analysis of HHG from two nuclei in HeH2+ is presented to further explain the underlying physical mechanism. |
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| Keywords: | high-order harmonic generation spatial distribution asymmetric molecule carrier envelope phase |
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