Intense attosecond pulse generated from a molecular harmonic plateau of H2+ in mid-infrared laser fields

Intense attosecond pulse generated from a molecular harmonic plateau of H2+ in mid-infrared laser fields
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中红外激光场中 H2 分子谐波平台产生的强阿秒脉冲

DOI:
10.1088/0953-4075/47/5/055601
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发表时间:
2014-03
期刊:
J. Phys. B
影响因子:
--
通讯作者:
Ruifeng Lu
Ruifeng Lu
中科院分区:
其他
文献类型:
--
作者:
Yunhui Wang;Qi Shi;Yadong Zhang;Ruifeng Lu

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用含时量子波包方法研究了H2+分子在强激光场中的高次谐波产生。谐波光谱的分子和原子平台有效地区分在大的核间距,其中的分子平台的谐波效率是几个数量级高于后者。我们报告的起源的分子超连续谱的物理模型,并揭示了这一平台的创建直接从本地化的两个潜在的威尔斯以下的激光场的分子内电子波包的干扰结果。这是我们第一次利用有效的分子平台,通过控制原子核和电子的动力学与中红外激光产生强烈的孤立的阿秒脉冲。此外,我们表明,谐波高原增强在宏观水平上通过求解麦克斯韦波动方程耦合薛定谔方程。
High-order harmonic generation from the molecular ion H2+ exposed to intense laser fields is investigated by the time-dependent quantum wave packet method. Molecular and atomic plateaus of harmonic spectra are effectively distinguished at large internuclear distances, where the harmonic efficiency of the molecular plateau is several orders of magnitude higher than that of the latter. We report on a physical model of the origin of the molecular supercontinua and reveal that the creation of this plateau directly results from the interference of the intramolecular electronic wave packet localized in two potential wells following the laser field. This is our first effort in utilizing the efficient molecular plateau to generate intense isolated attosecond pulses by controlling the dynamics of the nucleus and electrons with a mid-infrared laser. Further, we show that the harmonic plateau is enhanced at the macroscopic level by solving the Maxwell wave equation coupled with the Schrödinger equation.
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