2012/09/30 by Tian-Min Yan, D. Bauer · 116 citations
Chemistry · Physics and Astronomy · #Ab initio #Above threshold ionization #Advanced Chemical Physics Studies #Atomic physics #Chemistry #Condensed matter physics #Coulomb #Electric field #Electron #Ion #Ionization #Laser-Matter Interactions and Applications #Mass Spectrometry Techniques and Applications #Photoionization #Physics #Polarization (electrochemistry) #Quantum mechanics #Quantum tunnelling #Spectral line #Wavelength #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physreva.86.053403
published in Physical Review A 86(5) (American Physical Society) · 10 pages, 4 figures, RevTeX
arxiv created 2012/10/09 · openalex publication_date 2012/11/05 · arxiv updated 2017/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use a quantum trajectory-based semiclassical method to account for Coulomb interaction between the photoelectron and the parent ion in the classically forbidden sub-barrier region during strong-field tunneling-ionization processes. We show that---besides the well-known modification of the tunneling-ionization probability---there is also an influence on the interference pattern in the photoelectron spectra. In the long-wavelength limit, the shift of the intracycle interference fringes caused by sub-barrier Coulomb effects in the laser polarization direction can be derived analytically. We compare our results with ab initio solutions of the time-dependent Schr"odinger equation and find good agreement in the long-wavelength regime, whereas the standard strong-field approximation fails. We show that the nodal structure along low-order above-threshold ionization rings is also affected by sub-barrier Coulomb effects.