Significant discrepancy between the ionization time for parallel and anti-parallel electron emission in sequential double ionization

The ionization time in sequential double ionization with an elliptically polarized laser pulse has been examined theo-retically using a semiclassical method. The significant discrepancy between the ionization time for parallel and anti-parallel electron emission is predicted numerically for the first time. The impact of the carrier envelope phase offset is also studied in this work.