Generation of isolated circularly polarized attosecond pulses by three-color laser field mixing
OPTICS EXPRESS(2020)
摘要
We propose and theoretically demonstrate a method to generate the circularly polarized supercontinuum with three-color electric fields. The three-color field is synthesized from an orthogonally polarized two-color (OTC) laser field and an infrared gating field. All driving pulse durations are extended to 40 fs. We demonstrate that the three-color field imposes curved trajectories for ionized electrons and extends the time interval between each harmonic emitting. Through adjusting intensity ratios among three components of the driving field, a nearly circular isolated attosecond pulse can be generated. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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