Prediction of attosecond light pulses in the VUV range in a high-order-harmonic-generation regime

摘要

Attosecond light pulses within the vacuum ultraviolet (VUV) energy range are predicted by solving thentime-dependent Schr¨odinger equation (TDSE) for a model neon atom in short laser pulses of different fieldnpolarization states. We compare high-order harmonic generation in linearly polarized laser pulses to the methodnof polarization gating and find attosecond pulses that approach the Fourier limit of 700 as given by an indiumnfilter, spectrally centered at 15 eV. At such low energies, harmonic generation has low sensitivity to ellipticity,nwhich enables the generation of elliptically polarized attosecond pulses.We also show that emission at the atomicntransition energies is strongly damped by including intensity averaging.