Interference Control of Fano Resonances and Dynamical Imaging of an Electron Wave Packet
Journal Article
·
· Ultrafast Science
- ETH Zürich (Switzerland); Kansas State University, Manhattan, KS (United States)
- Max Planck Institute for Physics of Complex Systems, Dresden (Germany)
- ETH Zürich (Switzerland)
The Fano line shape, arising from the interference of pathways for the excitation of discrete and continuum states, plays a fundamental role in many branches of physics, chemistry, and materials science. Exciting the resonance with a high harmonic provides naturally a phase delay between the pathways leading to a complex asymmetry parameter. We demonstrate that its amplitude and phase can be controlled on the femtosecond and attosecond time scales, respectively. With our high-energy-resolution (10-meV) experiment, we dynamically image a resonance-enhanced electron wave packet during its temporal evolution, extracting both the amplitude and the phase. Calculations reproduce our experimental results. Our approach constitutes a method for measuring the photoionization delays of a resonance and enables the reconstruction of the electron wave packet in the time domain. This concept of an interference-controlled Fano line shape is a step toward attosecond quantum optics with potential ramifications into nanoscience and next-generation optical materials.
- Research Organization:
- Kansas State University, Manhattan, KS (United States)
- Sponsoring Organization:
- Marie Skłodowska-Curie; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
- Grant/Contract Number:
- FG02-86ER13491
- OSTI ID:
- 3003081
- Journal Information:
- Ultrafast Science, Journal Name: Ultrafast Science Vol. 5; ISSN 2765-8791
- Publisher:
- American Association for the Advancement of Science (AAAS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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