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arXiv physics/0310120physics.atom-ph
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少周期laser脉冲非顺序双电离

Nonsequential double ionization with few-cycle laser pulses

X. Liu, C. Figueira de Morisson Faria

摘要:

本文采用基于激光辅助非弹性$(e^-,2e^-)$再散射机制的经典模型,研究了线偏振、周期数脉冲非顺序双电离(NSDI)中的微分电子分布。我们发现,这些产量,作为平行于激光偏振的动量分量的函数,是高度不对称的,并强烈地受绝对相位的影响,即,几个周期的激光脉冲的载波振荡与其包络之间的相位差。事实上,在一个关键阶段,这样的分布会以激进的方式改变它们的符号。这种相位依赖性提供了绝对相位测量的可能性,这在原则上优于涉及高次谐波产生或阈值以上电离的方案。

英文摘要:

We investigate differential electron distributions in nonsequential double ionization (NSDI) with linearly polarized, few-cycle pulses, using a classical model based on a laser-assisted inelastic $(e^-,2e^-)$ rescattering mechanism. We show that these yields, as functions of the momentum components parallel to the laser polarization, are highly asymmetric, and strongly influenced by the absolute phase, i.e., the phase difference between the carrier oscillation of a few-cycle laser pulse and its envelope. Indeed, around a critical phase, such distributions change their sign in a radical fashion. This phase dependence provides a possibility for absoute-phase measurements which is, in principle, superior to the schemes involving high-order harmonic generation or above-threshold ionization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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