Abstract
We numerically investigate the high-order harmonic generation and isolated attosecond pulse generation in a waveform that linearly produced by chirped laser pulse, chirp-free laser pulse, and static electric field. When a chirp-free laser pulse is added to the produced field of the chirped driving pulse and the static electric field, the plateau harmonic yield is enhanced by two orders. The spectral modulation is also significantly decreased, and the bandwidth of XUV spectrum is further broadened. An intense and a clean isolated 38-as pulse can be produced from the intense broadband XUV supercontinuum. After proper phase compensation, an isolated sub-8-attosecond pulse can be obtained. Furthermore, quantum time–frequency analysis reveals that the selection of the short quantum path can be achieved in this scheme.
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Mohebbi, M. Generation of isolated sub-40-attosecond pulse with a multicycle chirped laser and a static electric field. Appl. Phys. B 122, 39 (2016). https://doi.org/10.1007/s00340-015-6313-8
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DOI: https://doi.org/10.1007/s00340-015-6313-8