| 联合双原子高次谐波发射的动力学研究 |
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| 引用本文： | 刘俊星,张建新.联合双原子高次谐波发射的动力学研究[J].科学技术与工程,2007,7(23):6010-6013. |
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| 作者姓名： | 刘俊星 张建新 |
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| 作者单位： | 嘉兴学院机电工程学院,嘉兴,314001 |
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| 摘 要： | 首先从经典理论出发,分析了一维普薛耳-特勒势(P-T势)模型原子在激光场作用下的动力学行为。进而设定联合双原子模型的核间距。然后利用一束特殊设定的双色激光脉冲辐照该模型,在保证原子有适当的电离和较大的复合效率的前提下,获得了截止位置远达Ip 8Up且效率高达10-9的高次谐波发射。最后给出了电离电子空间波包随时间的演化行为,并从波包动力学出发对谐波发射功率谱的形成机制给出了合理的解释。
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| 关 键 词： | 高次谐波 联合双原子 双色激光场 波包 |
| 文章编号： | 1671-1819(2007)23-6010-04 |
| 修稿时间： | 2007-07-20 |
Dynamic Behavior Approach to High-order Harmonic Generation from a United-atom Model |
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| LIU Jun-xing,ZHANG Jian-xin.Dynamic Behavior Approach to High-order Harmonic Generation from a United-atom Model[J].Science Technology and Engineering,2007,7(23):6010-6013. |
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| Authors: | LIU Jun-xing ZHANG Jian-xin |
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| Institution: | Mechanical and Electrical Engineering College, Jiaxing University, Jiaxing 314001 , P. R. China |
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| Abstract: | The dynamic behavior of a P-T potential model atom exposed to laser pulses has been carefully analyzed by employing the classical theory; the inter-nuclear separation was especially designed. A HHG spectrum from a united-atom system exposed to the specially designed two-color laser pulses mentioned above is presented, the emission efficiencies of the harmonics near the cutoff (Ip 8Up) are especially enhanced to 10-9. It is shown that the proper ionization yield and abundant recombination efficiency of the atom are crucial factors in obtaining the high efficiency of the HHG. The wavepacket evolution of the ionized electron is presented and given a reasonable explanation of the spectrum based on wavepacket dynamical. |
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| Keywords: | HHG united-atom model combined lasers wavepacket |
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