The generation of high-order harmonics and single attosecond pulses via the asymmetric polarization gating technology has been theoretically investigated. It is shown that when the two circularly polarized laser fields are asymmetric in amplitude and phase, not only can the modulations of the harmonic spectrum be decreased, but also the efficiencies of the harmonics can be enhanced. As a result, a super-continuum with the bandwidth of 85 eV, contributed by the single harmonic emission peak and the near-single short quantum path, can be obtained. Finally, through the Fourier transformation of the selected harmonics on this supercontinuum, a near-single attosecond pulse with a full width at half maximum of 52 as can be obtained.
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Published in Zhurnal Prikladnoi Spektroskopii, Vol. 86, No. 5, pp. 794–801, September–October, 2019.
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Liu, H., Castle, R.S. & Feng, A.Y.Z. Generation of Single Attosecond Pulse by Using Asymmetric Polarization Gating Technology. J Appl Spectrosc 86, 877–884 (2019). https://doi.org/10.1007/s10812-019-00909-y
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DOI: https://doi.org/10.1007/s10812-019-00909-y