轨道分辨自旋全息术：库仑聚焦在目标依赖极化中的作用
Orbit-resolved spin holography: role of Coulomb focusing in target-dependent polarization
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中文总结 AI 辅助
研究蜘蛛状自旋条纹轨道分辨起源及目标依赖性机制，用库仑量子轨道强场近似分离贡献，发现条纹源于\(p\)轨道电离通道干涉，极化取决于轨道类贡献平衡，光电子自旋纹理可补充动量分布探测库仑驱动强场动力学。
中文摘要 AI 辅助
强场光电子全息术通过动量空间干涉对超快电子动力学进行编码。然而，蜘蛛状自旋条纹的轨道分辨起源及其目标依赖性的潜在机制仍不清楚。在此，我们通过分析隧穿电离过程中产生的光电子自旋纹理来解决这两个问题。我们使用库仑量子轨道强场近似，并以针对\(He^+\)和Xe的含时薛定谔方程模拟为基准，以分离轨道通道和量子轨道贡献。蜘蛛状条纹源于单个轨道类中具有不同磁量子数的\(p\)轨道电离通道之间的干涉，因此不需要轨道间干涉。然而，沿这些条纹的可观测极化取决于轨道类贡献之间的平衡。这种分解将\(He^+\)和Xe相反的第一支路极化与激光偏转和前向散射轨迹的不同相对权重联系起来，这与目标依赖的库仑聚焦一致。因此，光电子自旋纹理作为库仑驱动强场动力学的探针补充了动量分布。
英文摘要
Strong-field photoelectron holography encodes ultrafast electron dynamics through momentum-space interference. However, the orbit-resolved origin of spider-like spin fringes and the mechanism underlying their target dependence remain unclear. Here, we resolve both issues by analyzing photoelectron spin textures generated during tunneling ionization. We use the Coulomb quantum-orbit strong-field approximation, benchmarked against time-dependent Schrödinger equation simulations for $\mathrm{He^+}$ and Xe, to separate orbital-channel and quantum-orbit contributions. Spider-like fringes arise from interference between $p$-orbital ionization channels with different magnetic quantum numbers within an individual orbit class and therefore do not require interorbit interference. The observable polarization along these fringes, however, depends on the balance among orbit-class contributions. The decomposition associates the opposite first-leg polarizations of $\mathrm{He^+}$ and Xe with different relative weights of laser-deflected and forward-scattered trajectories, consistent with target-dependent Coulomb focusing. Photoelectron spin textures thus complement momentum distributions as probes of Coulomb-driven strong-field dynamics.
