| Ultrahigh Harmonic Generation from an Atom with Superposition of Ground State and Highly Excited States |
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| 作者姓名： | 杨玉军 陈基根 池方萍 朱颀人 张红星 孙家钟 |
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| 作者单位： | [1]Institute of Theoretical Chemistry, Jilin University, Changchun 130012 [2]Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 [3]Department of Physics, Taizhou University, Linhai 317000 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10474028 and 10604021. |
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| 摘 要： |
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| 关 键 词： | 超高分辨率 谐波 原子 相互作用 |
| 收稿时间： | 2006-12-20 |
| 修稿时间： | 2006-12-20 |
Ultrahigh Harmonic Generation from an Atom with Superposition of Ground State and Highly Excited States |
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| YANG Yu-Jun,CHEN Ji-Gen,CHI Fang-Ping,ZHU Qi-Ren,ZHANG Hong-Xing,SUN Jia-Zhong.Ultrahigh Harmonic Generation from an Atom with Superposition of Ground State and Highly Excited States[J].Chinese Physics Letters,2007,24(6):1537-1540. |
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| Authors: | YANG Yu-Jun CHEN Ji-Gen CHI Fang-Ping ZHU Qi-Ren ZHANG Hong-Xing SUN Jia-Zhong |
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| Affiliation: | 1 Institute of Theoretical Chemistry, Jilin University, Changchun 130012 2Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 3Department of Physics, Taizhou University, Linhai 317000 |
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| Abstract: | We investigate the high-order harmonic generation from an atom prepared in a superposition of ground state and highly excited state. When the atom is irradiated by an ultrashort pulse, the cutoff position of the plateau in the harmonic spectrum is largely extended compared with the case that the atom is initially in the ground state. The physics of the extension of the high-order harmonic plateau can be interpreted by the spatial structure of the atomic initial wave packet. We can optimize the generation of high-order harmonics by substituting the excited state for a particular coherent superposition of some highly excited states to form a spatially localized excited wave packet. |
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| Keywords: | 32 80 Rm 42 65 Ky |
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