Attosecond photoionization dynamics with stimulated core-valence transitions

Abstract

We investigate ionization of neon atoms by an isolated attosecond pump pulse in the presence of two coherent extreme ultraviolet or x-ray probe fields. The probe fields are tuned to a core-valence transition in the residual ion and induce spectral shearing of the photoelectron distributions. We show that the photoelectron-ion coincidence signal contains an interference pattern that depends on the temporal structure of the attosecond pump pulse and the stimulated core-valence transition. Many-body perturbation theory is used to compute "atomic response times" for the processes and we find strikingly different behavior for stimulation to the outer-core hole (2p - 2s) and stimulation to the inner-core hole (2p - 1s). The response time of the inner-core transition is found to be comparable to that of state-of-the-art laser-based characterization techniques for attosecond pulses.

12 pages, 5 figures

References in corpus (4)

• Quantum state-resolved probing of strong-field-ionized xenon atoms using femtosecond high-order harmonic transient absorption spectroscopy
• Spectro-temporal shaping of seeded free-electron laser pulses
• Two-photon finite-pulse model for resonant transitions in attosecond experiments
• Calculation of photoelectron spectra within the time-dependent configuration interaction singles scheme

Cited by in corpus (7)

• Propensity rules and interference effects in laser-assisted photoionization of helium and neon
• General Time-Dependent Configuration-Interaction Singles II: The Atomic Case
• Attosecond pulse characterization with coherent Rydberg wavepackets
• Relativistic time-dependent configuration-interaction singles
• Implementation of gauge-invariant time-dependent configuration interaction singles method for three-dimensional atoms
• Characterization of attosecond pulses in the soft x-ray regime
• Entanglement Transfer in a Composite Electron-Ion-Photon System