论文标题
通过光栅调制偶极发射的近场成像
Near-field imaging of dipole emission modulated by an optical grating
论文作者
论文摘要
多光子离子电子诞生于强烈的光场中，这将决定其短期未来。通过控制红外光束，我们使原子或分子能够产生极端的紫外线（XUV）脉冲并合成attosecond脉冲 - 有史以来最短的受控事件。在这里，我们表明弱倾斜的光束在基本梁上施加光栅，从而导致空间调制的attosecond脉冲。我们观察到频谱解析的近场XUV图像的调制，编码了回旋电子光谱阶段的所有信息，因此是由无结构原子产生的attosend脉冲。近场成像是一种测量Attosecond脉冲持续时间的有效方法，对于在氦中产生的软X射线脉冲尤其重要。对于更复杂的系统，它包括自动电离和巨型等离子体共振。
Multiphoton-ionized electrons are born into a strong light field that will determine their short-term future. By controlling the infrared beam, we enable atoms or molecules to generate extreme ultraviolet (XUV) pulses and synthesize attosecond pulses - the shortest controlled events ever produced. Here we show that a weak obliquely incident beam imposes an optical grating on the fundamental beam, resulting in a spatially modulated attosecond pulse. We observe the modulation on a spectrally resolved near-field XUV image, encoding all information of the spectral phase of the recollision electron and, therefore, the attosecond pulse produced by structureless atoms. Near-field imaging is an efficient method for measuring the duration of attosecond pulses, especially important for soft X-ray pulses created in helium. For more complex systems, it includes auto ionization and giant plasmon resonances.
