Laser and Particle Beams, Volume. 2022, Issue 1, 6948110(2022)

Bright High-Harmonic Generation through Coherent Synchrotron Emission Based on the Polarization Gating Scheme

Chuliang Zhou1,2, Ye Tian1,2, Yushan Zeng1,2, Zhinan Zeng1,2, and Ruxin Li1,2,3
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China
  • 2Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China
  • 3School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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    Relativistic surface high harmonics, combined with the use of polarization gating, present a promising route towards intense single attosecond pulses. However, they impose stringent requirements on ultra-high laser contrast and are restricted by large intensity losses in real experiments. Here, we numerically demonstrate that by setting an optimal time delay in the polarization gating scheme, the intensity of the generated single attosecond pulses can become approximately 100 times stronger than that with nonoptimal time delay in the coherent synchrotron emission process. When a petawatt-class driving laser irradiates a solid target, an ultra-dense electron nanobunch and a strong space-charge sheath develop, and the accumulated electrostatic energy is only released in half of the laser cycle when this electron nanobunch moves backward. This process results in the emission of intense high harmonics. Our study provides a reliable method for developing bright attosecond extreme ultraviolet pulses.


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    Chuliang Zhou, Ye Tian, Yushan Zeng, Zhinan Zeng, Ruxin Li. Bright High-Harmonic Generation through Coherent Synchrotron Emission Based on the Polarization Gating Scheme[J]. Laser and Particle Beams, 2022, 2022(1): 6948110

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    Paper Information

    Received: Oct. 13, 2021

    Accepted: Jan. 26, 2022

    Published Online: Mar. 17, 2022

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