Adiabatic theory of strong-field photoelectron momentum distributions near a backward rescattering caustic
Adiabatic theory of strong-field photoelectron momentum distributions near a backward rescattering caustic
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DOI：
10.1103/physreva.96.053416
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发表时间：
2017-11-17
影响因子：
2.9
通讯作者：
Tolstikhin, Oleg I.
中科院分区：
文献类型：
--
作者：
Morishita, Toru;Tolstikhin, Oleg I.
我们提出了一个全面的论述的因式分解公式的推导，描述强场光电子动量分布附近的最外层后向再散射焦散在绝热理论和计算验证。导出的公式适用于足够低频率的线偏振激光脉冲的电离，并且对于固定的脉冲幅度，当频率趋于零时变得精确。从公式得到的结果的收敛性得到精确的光电子动量分布通过求解含时薛定谔方程证明。该公式示出定量工作在隧道和过势垒制度的电离有限范围的潜力，以及与库仑尾的潜力。这为将来强场物理中的应用铺平了道路。特别是，这里给出的返回光电子波包的显式分析形式，使人们能够从实验光电子动量分布中提取光电子在母离子上弹性散射的微分截面。
We present a comprehensive treatise on the derivation of the factorization formula describing strong-field photoelectron momentum distributions near the outermost backward rescattering caustic within the adiabatic theory and its validation by calculations. The formula derived holds for ionization by linearly polarized laser pulses of sufficiently low frequency and becomes exact as the frequency tends to zero for a fixed pulse amplitude. The convergence of the results obtained from the formula to accurate photoelectron momentum distributions obtained by solving the time-dependent Schrodinger equation is demonstrated. The formula is shown to work quantitatively in both tunneling and over-the-barrier regimes of ionization for finite-range potentials as well as potentials with a Coulomb tail. This paves the way for future applications of the present theory in strong-field physics. In particular, the explicit analytical form of the returning photoelectron wave packet given here enables one to extract differential cross sections for elastic scattering of a photoelectron on the parent ion from experimental photoelectron momentum distributions.