期刊
NATURE PHOTONICS
卷 16, 期 4, 页码 304-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41566-022-00955-7
关键词
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资金
- Minerva Foundation
- Israeli Science Foundation
- Crown Center of Photonics
- European Research Council
- DFG [SM 292/5-2, IV 152/6-2, SPP 1840]
- European Union [899794]
- Azrieli Foundation
- Koshland Foundation
- Zuckerman STEM Leadership Program
This article introduces the development of attosecond-gated interferometry, which identifies the quantum nature of electronic wavepacket by measuring the electron's relative phase and amplitude under a tunnelling barrier.
Interferometry has been at the heart of wave optics since its early stages, resolving the coherence of the light field and enabling the complete reconstruction of the optical information it encodes. Transferring this concept to the attosecond time domain shed new light on fundamental ultrafast electron phenomena. Here we introduce attosecond-gated interferometry and probe one of the most fundamental quantum mechanical phenomena, field-induced tunnelling. Our experiment probes the evolution of an electronic wavefunction under the tunnelling barrier and records the phase acquired by an electron as it propagates in a classically forbidden region. We identify the quantum nature of the electronic wavepacket and capture its evolution within the optical cycle. Attosecond-gated interferometry has the potential to reveal the underlying quantum dynamics of strong-field-driven atomic, molecular and solid-state systems. Attosecond-gated interferometry is developed by combining sub-cycle temporal gating and extreme-ultraviolet interferometry. By measuring the electron's relative phase and amplitude under a tunnelling barrier, the quantum nature of the electronic wavepacket is identified.
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