在光电离子化中使用少数周期激光脉冲的绝对相现象
G G Paulus1, F Grasbon, H Walther
1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching bei München, Germany. ggp@mpq.mpg.de
Nature
|November 9, 2001
概括
研究人员通过实验证明了绝对激光相对光电子发射的影响,而没有相位稳定. 这一发现对于理解激烈的激光物质相互作用和非线性光学过程至关重要.
科学领域:
- 量子光学是一种量子光学.
- 超快的激光器 超快的激光器
- 原子物理 原子物理
背景情况:
- 短激光脉冲,在两个光学周期内,是研究光物质相互作用的关键.
- 这些脉冲的绝对相对于非线性过程至关重要,但在实验上很难控制.
- 之前的研究由于稳定性困难,缺乏绝对相位效应的直接实验证据.
研究的目的:
- 通过实验证明绝对激光相对光电子发射的影响.
- 开发一种观察绝对相位效应的方法,而不需要相位稳定.
- 为了研究绝对相在激光驱动的强烈原子电离中的作用.
主要方法:
- 在可见光谱中产生超短激光脉冲.
- 使用这些强烈的激光脉冲来电离原子.
- 使用相反的探测器在垂直于激光束的平面上检测发射的光电子.
- 对电子产量的射击对射击分析,以确定相位依赖的相关性.
主要成果:
- 实验证据显示绝对激光相对光电子发射的影响.
- 连续激光射击之间电子产量的显著反相对应的检测.
- 在没有活性相稳定的情况下观察绝对相位效应的技术的演示.
结论:
- 超短激光脉冲的绝对相显著影响光电子发射.
- 开发的技术允许研究激光物质相互作用的绝对相位效应.
- 这项工作为控制和理解非线性光学现象开辟了新的途径.
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