Tunable Tesla-Scale Magnetic Attosecond Pulses through Ring-Current Gating

Coherent control over electron dynamics in atoms and molecules using high-intensity circularly polarized laser pulses gives rise to current loops, resulting in the emission of magnetic fields. We propose, and demonstrate with ab initio calculations, “current-gating” schemes to generate direct or alt...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2023-12, Vol.14 (49), p.11160-11167
Main Authors: de las Heras, Alba, Bonafé, Franco P., Hernández-García, Carlos, Rubio, Angel, Neufeld, Ofer
Format: Article
Language:English
Subjects:
Letter
Physical Insights into Light Interacting with Matter
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Summary:Coherent control over electron dynamics in atoms and molecules using high-intensity circularly polarized laser pulses gives rise to current loops, resulting in the emission of magnetic fields. We propose, and demonstrate with ab initio calculations, “current-gating” schemes to generate direct or alternating-current magnetic pulses in the infrared spectral region, with highly tunable waveform and frequency, and showing femtosecond-to-attosecond pulse duration. In optimal conditions, the magnetic pulse can be highly isolated from the driving laser and exhibits a high flux density (∼1 T at a few hundred nanometers from the source, with a pulse duration of 787 attoseconds) for application in forefront experiments of ultrafast spectroscopy. Our work paves the way toward the generation of attosecond magnetic fields to probe ultrafast magnetization, chiral responses, and spin dynamics.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.3c02899