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Paper by Professor Luca Argenti published in Science

Fano ResonanceA paper by Professor Luca Argenti and others titled "Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron" has been published in Science volume 354.

Watching as helium goes topsy-turvy: Theorists have long pondered the underpinnings of the Fano resonance, a spectral feature that resembles adjacent rightside-up and upside-down peaks. An especially well-studied instance of this feature appears in the electronic spectrum of helium as a transient state undergoes delayed ionization. Two studies have now traced the dynamics of this state in real time. Gruson et al. used photoelectron spectroscopy to extract the amplitude and phase of the electron wave packet after inducing its interference with reference wave packets tuned into resonance at variable delays. Kaldun et al. used extreme ultraviolet absorption spectroscopy to probe the transient state while variably forcing ionization with a strong near-infrared field.

Posted Monday, November 14, 2016

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