Chen Jian-Hong, Wen Liang-Cai, Zhao Song-Feng
Opt Express. 2023 Feb 13;31(4):5708-5721. doi: 10.1364/OE.481153.
We present a theoretical study of the orbital-resolved photoelectron momentum distributions (PMDs) of F ions by a two-color counter-rotating circularly polarized field. We show that the PMDs of F ions can be modulated from an isotropic symmetric distribution into a three-lobe one by adding a weak fundamental counter-rotating field to the intense second harmonic circularly polarized field, and this modulation strongly depends on the initial atomic orbital. The PMDs simulated by the strong-field approximation method show good agreement with those obtained by solving the time-dependent Schrödinger equation. Based on the strong-field approximation method, we find that the radial momentum shift of PMDs for different orbitals is the fingerprint of orbital-dependent initial momentum at the tunnel exit. More importantly, we demonstrate that the lobes in PMDs appear in sequential order, highlighting that the scheme can be viewed as controllable rotating temporal Young's two-slit interferometer.
我们展示了通过双色反向旋转圆偏振场对F离子的轨道分辨光电子动量分布（PMD）进行的理论研究。我们表明，通过向强二次谐波圆偏振场中添加一个弱的基频反向旋转场，F离子的PMD可以从各向同性对称分布调制为三瓣分布，并且这种调制强烈依赖于初始原子轨道。用强场近似方法模拟的PMD与通过求解含时薛定谔方程得到的结果吻合良好。基于强场近似方法，我们发现不同轨道的PMD的径向动量偏移是隧道出口处轨道相关初始动量的指纹。更重要的是，我们证明了PMD中的瓣按顺序出现，这突出表明该方案可被视为可控旋转时间的杨氏双缝干涉仪。
