We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multielectron 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 intense few-cycle mid-infrared lasers, this offers a possible method for generating isolated attosecond pulses.
C. Jin et al., "Generation of Isolated Attosecond Pulses in the Far Field by Spatial Filtering with an Intense Few-Cycle Mid-Infrared Laser," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 84, no. 4, American Physical Society (APS), Oct 2011.
The definitive version is available at https://doi.org/10.1103/PhysRevA.84.043411
Keywords and Phrases
Continuum Structures; Far Field; Few-Cycle; Harmonic Field; High Order Harmonic Generation; Isolated Attosecond Pulse; Laser Fields; Midinfrared Lasers; Multi-Electron; Spatial Filterings; Theoretical Calculations; Time Frequency Analysis, Harmonic Analysis; Infrared Devices; Optical Parametric Oscillators; Pulse Generators, Infrared Lasers
International Standard Serial Number (ISSN)
Article - Journal
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