Li Zhang

Publications (4)12.64 Total impact

• Article: Dynamic chirp control and pulse compression for attosecond high-order harmonic emission.

  Yinghui Zheng, Zhinan Zeng, Pu Zou, Li Zhang, Xiaofang Li, Peng Liu, Ruxin Li, Zhizhan Xu
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  ABSTRACT: We propose a scheme to compensate dynamically the intrinsic chirp of the attosecond harmonic pulses. By adding a weak second harmonic laser field to the driving laser field, the chirp compensation can be varied from the negative to the positive continuously by simply adjusting the relative time delay between the two-color pulses. Using this technique, the compensation of the negative chirp in harmonic emission is demonstrated experimentally for the first time and the nearly transform-limited attosecond pulse trains are obtained.
  Physical Review Letters 08/2009; 103(4):043904. · 7.37 Impact Factor
• Article: Single sub-100 attosecond pulse generation in a two-colour time-gating laser field

  Li Zhang, Zhinan Zeng, Xiaohong Song, Hui Xiong, Yinghui Zheng, Ruxin Li, Zhizhan Xu
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  ABSTRACT: We theoretically propose a method of generating a single sub-100 attosecond (as) pulse with a two-colour time-gating laser field. The field is synthesized by an 8 fs/800 nm (three optical cycles) pulse and a 24 fs/2400 nm (three optical cycles) pulse with an optimal time delay between them. In our simulation, we obtain a supercontinuum with an extremely broad spectrum of 150 eV and generate an isolated attosecond pulse with 96 as pulse duration without any dispersion compensation.
  Journal of Physics B Atomic Molecular and Optical Physics 05/2008; 41(11):115601. · 1.88 Impact Factor
• Article: Enhancement and broadening of extreme-ultraviolet supercontinuum in a relative phase controlled two-color laser field.

  Yinghui Zheng, Zhinan Zeng, Xiaofang Li, Xiaowei Chen, Peng Liu, Hui Xiong, Hui Lu, Shitong Zhao, Pengfei Wei, Li Zhang, Zhiguang Wang, Jun Liu, Ya Cheng, Ruxin Li, Zhizhan Xu
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  ABSTRACT: We experimentally demonstrate the generation of an extreme-ultraviolet (XUV) supercontinuum in argon with a two-color laser field consisting of an intense 7 fs pulse at 800 nm and a relatively weak 37 fs pulse at 400 nm. By controlling the relative time delay between the two laser pulses, we observe enhanced high-order harmonic generation as well as spectral broadening of the supercontinuum. A method to produce isolated attosecond pulses with variable width and intensity is proposed.
  Optics Letters 03/2008; 33(3):234-6. · 3.40 Impact Factor
• Source

  Available from: Zhinan Zeng

  Article: Chirp compensation for attosecond pulse trains using two-color field

  Zhinan Zeng, Yinghui Zheng, Pu Zou, Li Zhang, Xiaofang Li, Ruxin Li, Zhizhan Xu
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  ABSTRACT: The phase compensation of the negatively chirp of the attosecond pulse train is demonstrated experimentally. By adding a weak second harmonic laser field, the phase compensation can be negatively chirp or positively chirp at different time delay, which support a new way to generate the strong transform-limited attosecond pulse.