Controlling Nonsequential Double Ionization in Two-Color Circularly Polarized Femtosecond Laser Fields
| Autor: | Jan L. Chaloupka, Ronny Knut, Franklin Dollar, Jennifer L. Ellis, Kevin M. Dorney, Patrik Grychtol, Margaret M. Murnane, Christian Gentry, Christopher A. Mancuso, Daniel D. Hickstein, Maithreyi Gopalakrishnan, Henry C. Kapteyn, Dmitriy Zusin |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Double ionization General Physics and Astronomy Intensity ratio Laser 01 natural sciences Helicity law.invention 010309 optics law Extreme ultraviolet Ionization 0103 physical sciences Femtosecond Physics::Atomic and Molecular Clusters Harmonic Physics::Atomic Physics Atomic physics 010306 general physics |
| Zdroj: | Physical Review Letters. 117 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.117.133201 |
| Popis: | Atoms undergoing strong-field ionization in two-color circularly polarized femtosecond laser fields exhibit unique two-dimensional photoelectron trajectories and can emit bright circularly polarized extreme ultraviolet and soft-x-ray beams. In this Letter, we present the first experimental observation of nonsequential double ionization in these tailored laser fields. Moreover, we can enhance or suppress nonsequential double ionization by changing the intensity ratio and helicity of the two driving laser fields to maximize or minimize high-energy electron-ion rescattering. Our experimental results are explained through classical simulations, which also provide insight into how to optimize the generation of circularly polarized high harmonic beams. |
| Databáze: | OpenAIRE |
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