Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser

Abstract

We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multi-electron effects and macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. By using the time-frequency analysis we show that the reshaping of the fundamental laser field is responsible for the continuum structure in the HHG spectra. We further suggest a method for obtaining an isolated attosecond pulse (IAP) by using a filter centered on axis to select the harmonics in the far field with different divergence. We also discuss the carrier-envelope-phase dependence of an IAP and the possibility to optimize the yield of the IAP. With the intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.

8 figures

References in corpus (7)

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• Quantitative Rescattering Theory for high-order harmonic generation from molecules
• Medium propagation effects in high harmonic generation of Ar and N${}_2$
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Cited by in corpus (5)

• Intensity dependence of multiple orbital contributions and shape resonance in high-order harmonic generation of aligned N${}_2$ molecules}
• Solitary beam propagation in a nonlinear optical resonator enables high-efficiency pulse compression and mode self-cleaning
• Influence of gas pressure on high-order harmonic generation of Ar and Ne
• Generation of broad XUV continuous high harmonic spectra and isolated attosecond pulses with intense mid-infrared lasers
• Correlation enhancement of high-order harmonics generation in Xe