Fano line shape metamorphosis in resonant two-photon ionization
arXiv:2405.14080 · doi:10.1103/PhysRevA.110.043107
Abstract
Two-photon atomic ionization driven by time-locked XUV and IR pulses allows to study dynamics of Fano resonances in time and energy domains. Different time evolution of the two interfering pathways leading to a Fano resonance can be exploited to turn the Fano profile of the two-photon XUV/IR ionization into a symmetric Gaussian once the directly ejected photoelectron leaves the parent ion and cannot any longer absorb an IR photon. This line shape transformation allows for the direct determination of the resonant lifetime from the spectroscopic measurements without need for an extremely fine energy resolution. Ubiquitous nature of Fano resonances makes this determination a universal tool in diverse quantum systems ranging from nuclei to nano-fabricated solids.
5 pages, 3 figures
References in corpus (9)
- Fano resonances in nanoscale structures
- Lorentz meets Fano spectral line shapes: A universal phase and its laser control
- Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron
- Theory of attosecond delays in laser-assisted photoionization
- Phase measurement of a Fano window resonance using tunable attosecond pulses
- Bound states in the continuum in photonic structures
- Femtosecond induced transparency and absorption in the extreme ultraviolet by coherent coupling of the He 2s2p (1P0) and 2p2 (1Se) double excitation states with 800 nm light
- Time-frequency representations of autoionization dynamics in helium
- Laser-assisted-autoionization dynamics of helium resonances with single attosecond pulses