Roles of laser ellipticity in attoclock
arXiv:2212.09886 · doi:10.1103/PhysRevA.107.043109
Abstract
We study ionization of atoms in strong elliptically-polarized laser fields numerically and analytically. We focus on effects of laser ellipticity on the offset angle in photoelectron momentum distribution. This angle is considered to encode time information of tunneling ionization in attoclock experiments. The calculated offset angle increases with the decrease of ellipticity but the momentum along the major axis of laser polarization related to this angle changes slowly, in agreement with experiments. With a Coulomb-included strong-field model, the scaling laws for ellipticity dependence of this angle and relevant momentum components are obtained, and the ellipticity dependence of Coulomb-induced ionization time lag encoded in this angle is also addressed.
arXiv comment7 pages, 4 figures
References in corpus (11)
- Low-Energy Structures in Strong Field Ionization Revealed by Quantum Orbits
- Tunneling Time in Ultrafast Science is Real and Probabilistic
- Experimental evidence for Wigner's tunneling time
- Ionization Time and Exit Momentum in Strong-Field Tunnel Ionization
- Tunneling dynamics in multiphoton ionization and attoclock calibration
- Attoclock revisited on electron tunnelling time
- Probing the longitudinal momentum spread of the electron wave packet at the tunnel exit
- Keldysh-Rutherford model for attoclock
- Tracing origins of asymmetric momentum distribution for polar molecules in strong linearly-polarized laser fields
- Coulomb Effects on time-trajectory-resolved high-order harmonic generation
- Characterizing Sub-Cycle Electron Dynamics of Polar Molecules by Asymmetry in Photoelectron Momentum Distributions