Multiphoton interaction phase shifts in attosecond science

Abstract

Ab initio simulations of a range of interferometric experiments are used to identify a strong dependence on multiphoton phase shifts in above-threshold ionization. A simple rule of thumb for interaction phase shifts is derived to explain both the conservation of photoelectron yield and its absolute CEP-dependence. For instance, it is found that interferometric above-threshold ionization experiments are shifted by $\pi /4$ relative to RABBIT experiments, and that there is no RABBIT-term in a laser-assisted photoionization experiment with odd and even harmonics. Thus, our work helps to resolve the issues of interpretation of quantum dynamics in attosecond and free-electron laser sciences.

References in corpus (11)

• Probing single-photon ionization on the attosecond time scale
• Photoionization in the time and frequency domain
• Theory of attosecond delays in laser-assisted photoionization
• Attosecond Pulse-shaping using a seeded free-electron laser
• Phase measurement of a Fano window resonance using tunable attosecond pulses
• Photo-electron momentum spectra from minimal volumes: the time-dependent surface flux method
• Phase Measurement of Resonant Two-Photon Ionization in Helium
• Modulation of attosecond beating in resonant two-photon ionization
• Quantum mechanical approach to probing the birth of attosecond pulses using a two-color field
• A new method for measuring angle-resolved phases in photoemission
• Molecular Recollision Interferometry in High Harmonic Generation

Cited by in corpus (6)

• Studying ultrafast Rabi dynamics with a short-wavelength seeded free-electron laser
• Phase delays in $\omega -2\omega$ above-threshold ionization
• Semiclassical strong-field theory of phase delays in $\omega -2\omega$ above-threshold ionization
• Generation of Attosecond Pulses with Controllable Carrier-Envelope Phase via High-order Frequency Mixing
• Dipole-laser coupling delay in two-color (RABBITT) photoionization of polar molecules
• Complete characterization of multi-channel single photon ionization