Energy quantization in double ioinization in strong laser fields

强激光场中双电离的能量量子化

• 批准号: 235637746
• 负责人: Professor Dr. Reinhard Dörner
• 金额: --
• 依托单位: Institut für Kernphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/235637746?language=en
• 关键词: Energy; quantization; double; ioinization; strong

Femtosecond lasers today routinely provide intensities at which many photons can be absorbed by a single atom leading to the ejection of one or more electrons. For emission of a single electron the quantization of the energy of the light field leads to discrete peaks in the energy spectrum of the emitted electron which are spaced by the photon energy. For ejection of two electrons discrete energy structures in the two electron continuum are predicted by theory but have not been observed experimentally so far. This projects aims to provide this missing experimental evi-dence. Since October 2011 we have a new unique femtosecond Laser (100 kHz, 100 uJ at 800 nm, 45 fsec) together with a dedicated COLTRIMS reaction microscope in our laboratory at Frankfurt University. We propose to use this facility to show for the first time the long predicted quantization of energy in the two electron continuum in strong field double ionization. We will address many open questions connected to this fundamental quantum phenomenon such as verification of the ponderomotive shift in the two electron continuum, consequences of the even or odd symmetry of the two electron continuum resulting from the even or odd number of photons absorbed and the question if only the sum energy or for sequential ionization also the individual electron energy is quantized.

今天的飞秒激光器通常提供强度，其中许多光子可以被单个原子吸收，从而导致一个或多个电子的射击。对于单个电子的发射，光场的能量的量化导致发射电子能量光谱中的离散峰，该峰会由光子能量分布。为了在两个电子连续体中射出两个电子离散的能量结构，从理论上预测，但到目前为止尚未在实验上观察到。该项目旨在提供这种缺失的实验性EVI文学。自2011年10月以来，我们在法兰克福大学的实验室中，有了新的独特的飞秒激光器（100 kHz，100 UJ，800 nm，45 FSEC），以及专用的Coltrims反应显微镜。我们建议使用该设施首次显示强场在强场上双电离中的长期预测能量的量化。我们将解决与这种基本量子现象相关的许多开放问题，例如对两个电子连续体的浮动转移的验证，这是两个电子连续体的均匀或奇数对称性的后果，而偶数或奇数的光子数量是由吸收的偶数或奇数，以及对于顺序离子化的总和或对单个电子的能量而言，该问题也仅是量化的。