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任意夹角的双色偏振激光作用下孤立阿秒脉冲的产生

夏昌龙 刘学深

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任意夹角的双色偏振激光作用下孤立阿秒脉冲的产生

夏昌龙, 刘学深

Generating isolated attosecond pulses at an arbitrary angle of the two-color polarized laser pulse

Xia Chang-Long, Liu Xue-Shen
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  • 本文选取脉宽为12 fs波长为2000 nm和800 nm的两束线性偏振激光, 适当调节两束激光的偏振方向的夹角θ, 发现当θ=π/2时, 高次谐波谱的第二级平台出现了“漏斗形”凹槽.当θ为π/6时, 得到了290 eV的超宽连续谱的高次谐波发射, 利用小波变换合理的解释了高次谐波形状及截止位置. 在该段连续谱上任意截取70 eV宽度的频率, 都可以得到脉宽约为60 as的孤立阿秒脉冲. 适当减小截取范围可以得到线性偏振的脉宽94 as的孤立阿秒脉冲. 这为实验中产生能灵活调节的孤立阿秒脉冲提供了一种方案.
    By adjusting the polarized angle of a two-color laser field that is synthesized by a 12 fs/2000 nm and 12 fs/800 nm, we find that the spectrum of the high-order harmonic generation has a “funnel structure” in the second plateau when θ is π/2. And when θ is π/6, a bandwidth of supercontinuum about 290 eV is observed. We illustrate the structure of the high-order harmonic generated spectrum by the time-frequency analysis. An isolated attosecond pulse is obtained by intercepting an arbitrary 70 eV width in the supercontinuum plateau, and whose full width at half maximum (FWHM) is about 60 as. When we intercept a narrow width of the bandwidth of supercontinuum, a linear polarized attosecond pulse with FWHM 94 as is obtained. All those are convenient to generate and use attosecond pulse in experiment.
    • 基金项目: 国家自然科学基金(批准号: 10974068, 11174108)和吉林大学研究生创新基金资助项目(批准号: 20111032)资助的课题.
    • Funds: Project supported by the National Natural Science Foundation of China (Grand Nos. 10974068, 11174108), and the Graduate Innovation Fund of Jilin University (Grand No. 20111032).
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  • [1]

    Föhlish A, Feulner P, Hennies F, Fink A, Menzel D, Sanchez- Portal D, Echenique P M, Wurth W 2005 Nature 436 373

    [2]

    Hentschel M, Kienberger R, Spielmann Ch, Reider G A, Milosevic N, Brabec T, Corkum P, Heinzmann U, Drescher M, Krausz F 2001 Nature 414 509

    [3]

    Sansone G, Benedetti E, Calegari F, Vozzi C, Avaldi L, Flammini R, Poletto L, Villoresi P, Altucci C, Velotta R, Stagira S, Silvestri S D, Nisoli M 2006 Science 314 443

    [4]

    Goulielmakis E, Schultze M, Hofsteter M, Yakovlev V S, Gagnon J, Uiberacker M, Aquila A L, Gullikson E M, Attwood D T, Kienberger R, Krausz F, U Kleineberg 2008 Science 320 1614

    [5]

    Feng X, Gilbertson S, Mashiko H, Wang H, Khan S D, Chini M, Wu Y, Zhao K, Chang Z 2009 Phys. Rev. Lett. 103 183901

    [6]

    Corkum P B 1993 Phys. Rev. Lett. 71 1994

    [7]

    Zeng Z N, Cheng Y, Song X H, Li R X, Xu Z Z 2007Phys. Rev. Lett. 98 203901

    [8]

    Ye X L, Zhou X X, Zhao S F, Li P C 2009 Acta Phys. Sin. 58 1579 (in Chinese) [叶小亮, 周效信, 赵松峰, 李鹏程 2009 物理学报 58 1579]

    [9]

    Wu J, Zhang G T, Xia C L, Liu X S 2010 Phys. Rev. A 82 013411

    [10]

    Zhang Q B, Hong W Y, Lan P F, Yang Z Y, Lu P X 2008 Acta Phys. Sin. 57 7848(in Chinese) [张庆斌, 洪伟毅, 兰鹏飞, 杨振宇, 陆培祥 2008 物理学报 57 7848]

    [11]

    Xia C L, Zhang G T,Wu J, Liu X S 2010 Phys. Rev. A 81 043420

    [12]

    Zou P, Li R X, Zeng Z N, Xiong H, Liu P, Leng Y X, Fan P Z, Xu Z Z 2010 Chin. Phys. B 19 019501

    [13]

    Hong WY, Lu P X, Lan P F, Li Q G, Zhang Q B, Yang Z Y,Wang X B 2008 Phys. Rev. A 78 063407

    [14]

    Cheng C Z, Zhou X X, Li P C 2011 Acta Phys. Sin. 60 033203 (in Chinese) [成春芝, 周效信, 李鹏程 2011 物理学报 60 033203]

    [15]

    Feit M D, Fleck J A, JR, Steiger A 1982 J. Comput. Phys. 47 412

计量
  • 文章访问数:  5588
  • PDF下载量:  446
  • 被引次数: 0
出版历程
  • 收稿日期:  2010-12-03
  • 修回日期:  2011-04-18
  • 刊出日期:  2012-02-05

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