| Original Articles |
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A Time-Distinguished Analysis of the Harmonic Structure from a Model Molecular Ion |
| YANG Yu-Jun;CHEN Gao;CHEN Ji-Gen;ZHU Qi-Ren |
| Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 |
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| Cite this article: |
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YANG Yu-Jun, CHEN Gao, CHEN Ji-Gen et al 2004 Chin. Phys. Lett. 21 652-655 |
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Abstract We present high-order harmonic generation spectra resulted from a single-electron model molecular ion exposed to intense laser fields by numerically solving a one-dimensional time-dependent Schrödinger equation. There are three plateaus in the spectra and the maximal cutoff energy is Ip + 8.5Up, when the inter-nuclear distance R equals πα0/2. Here Ip is the ionization potential and Up = E20/(4ω2) is the ponderomotive potential with E0 and ω being the laser electric field amplitude and the central frequency. The harmonic structures are well interpreted by a modified three-step model in which the effects of the electron reflected by the non-parent ion are stressed.
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| Keywords:
32.80.Rm
42.50.Hz
42.65.Ky
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Published: 01 April 2004
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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