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Control of strong-field ionization in ferroelectric lithium niobate: Role of the spontaneous polarization

机译:铁电锂铌酸盐强野电离的控制:自发极化的作用

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摘要

We report the control of tunnel ionization in lithium niobate (LiNbO_3) using phase-controlled two-color laser fields. Through a macroscopic observable of high contrast, we disclose the crucial contribution of the microscopic spontaneous polarization of the ferroelectric material to the ionization rate: as the relative two-color phase is varied, the ablated area of LiNbO_3 is modulated by 35% when the laser and crystal polarization directions are parallel. Rotating the sample by 180° around the laser propagation axis leads to an out-of-phase modulation. We use a two-band model to highlight the key contribution of the material's spontaneous polarization for the symmetry breaking of the ionization rate. Our results open new perspectives for the direct control of ionization dynamics in solids by tailoring the electric field of femtosecond laser pulses.
机译:我们使用相位控制的双色激光场报告铌酸锂(LINBO_3)中隧道电离的控制。通过高对比度的宏观观察,我们公开了铁电材料对电离速率的微观自发极化的关键贡献:随着相对双相相变化,当激光时,LINBO_3的烧蚀区域被35%调节35%并且晶体偏振方向是平行的。在激光传播轴周围将样品旋转180°导致相位外调制。我们使用双频模型来突出材料的自发极化对电离率的对称性偏振的关键贡献。我们的结果通过剪裁飞秒激光脉冲的电场,开辟了直接控制固体中的电离动力学的新视角。

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  • 来源
    《Physical review》 |2020年第18期|184103.1-184103.6|共6页
  • 作者单位

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada Center for Free-Electron Laser Science DESY Hamburg 22607 Germany Institute for Photonics and Nanotechnologies CNR-IFN Milano 20133 Italy;

    University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

    Center for Free-Electron Laser Science DESY Hamburg 22607 Germany Institute for Photonics and Nanotechnologies CNR-IFN Milano 20133 Italy Physics Department University of Hamburg Hamburg 22761 Germany;

    State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China;

    Centre Energie Materiaux Telecommunications Institut National de la Recherche Scientifique Varennes J3X1S2 Canada;

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