Analytic quantum-interference conditions in Coulomb corrected photoelectron holography
Analytic quantum-interference conditions in Coulomb corrected photoelectron holography
复制标题
DOI：
10.1088/1361-6455/aa9e81
复制
发表时间：
2018-02-28
影响因子：
1.6
通讯作者：
Faria, C. Figueira de Morisson
中科院分区：
文献类型：
--
作者：
Maxwell, A. S.;Al-Jawahiry, A.;Faria, C. Figueira de Morisson
给出了阈值以上电离跃迁几率和光电子角分布的近似解析表达式。这些解析表达式比文献中存在的解析表达式更一般，并且包含了电子连续谱传播中的剩余结合势。他们成功地复制了ATI旁瓣和特殊的全息结构，如接近阈值的扇形图案和延伸到相对较高光电子能量的蜘蛛状结构。对于不同的驱动场频率和强度，我们将其与库仑量子轨道强场近似(CQSFA)和含时薛定谔方程的全解进行了比较，并对特定全息结构背后的物理机制进行了深入的分析。我们的结果进一步阐明了CQSFA的哪些方面必须优先考虑才能获得关键的全息特征，并强调了前向散射轨迹的重要性。此外，我们发现，即使凯尔德什参数大致保持不变，全息图案也会随着场参数的不同而发生很大的变化。
We provide approximate analytic expressions for above-threshold ionization (ATI) transition probabilities and photoelectron angular distributions. These analytic expressions are more general than those existing in the literature and include the residual binding potential in the electron continuum propagation. They successfully reproduce the ATI side lobes and specific holographic structures such as the near-threshold fan-shaped pattern and the spider-like structure that extends up to relatively high photoelectron energies. We compare such expressions with the Coulomb quantum orbit strong-field approximation (CQSFA) and the full solution of the time-dependent Schrodinger equation for different driving-field frequencies and intensities, and provide an in-depth analysis of the physical mechanisms behind specific holographic structures. Our results shed additional light on what aspects of the CQSFA must be prioritized in order to obtain the key holographic features, and highlight the importance of forward scattered trajectories. Furthermore, we find that the holographic patterns change considerably for different field parameters, even if the Keldysh parameter is kept roughly the same.