Above-threshold ionization by polarization-crafted pulses

IF 1.5 4区物理与天体物理 Q3 OPTICS

The European Physical Journal D Pub Date : 2024-09-04 DOI:10.1140/epjd/s10053-024-00907-6

Camilo Granados, Enrique G. Neyra, Lorena Rebón, Marcelo F. Ciappina

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Abstract

Coherent light has revolutionized scientific research, spanning biology, chemistry and physics. To delve into ultrafast phenomena, the development of high-energy, highly tunable light sources is instrumental. Here, the photoelectric effect is a pivotal tool for dissecting electron correlations and system structures. Particularly, above-threshold ionization (ATI), characterized by the simultaneous absorption of several photons leading to a final electron energy well above the ionization threshold, has been widely explored, both theoretically and experimentally. ATI decouples laser field effects from the structural information carried by photoelectrons, particularly when utilizing ultrashort pulses. In this contribution, we study ATI driven by polarization-crafted (PC) pulses, which offer precise scanning over the electron momentum, through an accurate change of the polarization state. PC pulses enable the manipulation of photoelectron momentum distributions, opening up new avenues for understanding and harnessing coherent light. Our work explores how structured light could allow for a proper understanding of emitted photoelectrons momentum distributions in order to distinguish between light structure effects and target structure effects.

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利用偏振创建脉冲实现阈值以上电离

摘要相干光为生物学、化学和物理学领域的科学研究带来了革命性的变化。要深入研究超快现象，就必须开发高能量、高可调谐光源。其中，光电效应是剖析电子关联和系统结构的关键工具。尤其是阈上电离（ATI），其特点是同时吸收多个光子，导致最终电子能量远高于电离阈值。ATI 将激光场效应与光电子携带的结构信息分离开来，尤其是在利用超短脉冲时。在这篇论文中，我们研究了由偏振创建（PC）脉冲驱动的 ATI，这种脉冲通过精确改变偏振态，对电子动量进行精确扫描。PC 脉冲能够操纵光电子动量分布，为理解和利用相干光开辟了新途径。我们的工作探讨了结构光如何能够正确理解发射的光电子动量分布，以区分光结构效应和目标结构效应。

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来源期刊

The European Physical Journal D 物理-物理：原子、分子和化学物理

CiteScore

3.10

自引率

11.10%

发文量

213

审稿时长

3 months

期刊介绍： The European Physical Journal D (EPJ D) presents new and original research results in: Atomic Physics; Molecular Physics and Chemical Physics; Atomic and Molecular Collisions; Clusters and Nanostructures; Plasma Physics; Laser Cooling and Quantum Gas; Nonlinear Dynamics; Optical Physics; Quantum Optics and Quantum Information; Ultraintense and Ultrashort Laser Fields. The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.