Two-Photon Resonance Generation of Single and Double Attosecond Pulses in Ar +

Abstract

The resonance generation and propagation of single as well as double attosecond pulses in Ar+ are presented via numerical simulations. Two-photon Raman-type self-induced transparency (RSIT) of the pulses is investigated. The transient pulse behavior when the input pulse is not in the RSIT regime is investigated to optimize the transition from an input few-cycle pulse to an output attosecond pulse that is in the RSIT regime. The spectral dynamics of the pulses is also presented. The coherent lengths of plasma mismatching are calculated for the attosecond pulses.