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Vacuum space charge effect in laser-based solid-state photoemission spectroscopy

机译：激光固态光发射光谱中的真空空间电荷效应

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摘要

We report a systematic measurement of the space charge effect observed in the few-picosecond laser pulse regime in laser-based solid-state photoemission spectroscopy experiments. The broadening and the shift of a gold Fermi edge as a function of spot size, laser power, and emission angle are characterized for pulse lengths of 6 ps and 6 eV photon energy. The results are used as a benchmark for an N-body numerical simulation and are compared to different regimes used in photoemission spectroscopy. These results provide an important reference for the design of time- and angle-resolved photoemission spectroscopy setups and next-generation light sources.
机译：我们报告了在基于激光的固态光发射光谱实验中，在几皮秒激光脉冲范围内观察到的空间电荷效应的系统测量。对于6 ps的脉冲长度和6 eV的光子能量，费米金边缘的展宽和位移随光斑尺寸，激光功率和发射角的变化而变化。结果用作N体数值模拟的基准，并与光发射光谱中使用的不同方案进行了比较。这些结果为设计时间分辨和角度分辨的光发射光谱学设置以及下一代光源提供了重要参考。

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  • 来源
    《Journal of Applied Physics》 |2010年第1期|014912.1-014912.7|共7页
  • 作者

    J. Graf; S. Hellmann; C. Jozwiak; C. L. Smallwood; Z. Hussain; R. A. Kaindl; L. Kipp; K. Rossnagel; A. Lanzara;

  • 作者单位

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Department of Physics, University of California, Berkeley, California 94720, USA;

    Institute for Experimental and Applied Physics, University of Kiel, D-24098 Kiel, Germany;

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Department of Physics, University of California, Berkeley, California 94720, USA;

    Department of Physics, University of California, Berkeley, California 94720, USA;

    Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA;

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA;

    Institute for Experimental and Applied Physics, University of Kiel, D-24098 Kiel, Germany;

    Institute for Experimental and Applied Physics, University of Kiel, D-24098 Kiel, Germany;

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Department of Physics, University of California, Berkeley, California 94720, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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