Abstract
In this work, we focused on the angular photoelectron emission from helium generated by an Attosecond Pulse Train (APT) in the presence of a weak Infrared (IR) field. The APT creates both an excited and a continuum electron wave packets. By ionizing the excited state with the IR pulse, a delayed new continuum electron wave packet is created. Consequently, a mix of energy-degenerate even and odd parity states is fed in the continuum by one- and two-photon transitions. These interfere, leading to an asymmetric electron emission along the polarization vector. The interference can be controlled by varying the time delay between the APT and IR pulses.KeywordsElectron Wave PacketBarium Borate15th HarmonicAttosecond Pulse TrainBeta Barium BorateThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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