laser驱动软原子核中的电子能量聚束
Electron-energy bunching in laser-driven soft recollisions
摘要：
介绍了激光与物质相互作用中的软碰撞。它们的特征在于电子在碰撞时丢失离子，与众所周知的负责高谐波产生或阈值以上电离的正面碰撞相反。我们分析表明，软结晶可以引起一个聚束的光电子能量，通过一系列的低能量峰出现在电子产额沿激光偏振轴。这个峰序列是普遍的，它不依赖于结合势，并发现低于五分之一的有质动能的过剩能量。
英文摘要：
We introduce soft recollisions in laser-matter interaction. They are characterized by the electron missing the ion upon recollision in contrast to the well-known head-on collisions responsible for high-harmonic generation or above-threshold ionization. We demonstrate analytically that soft recollisions can cause a bunching of photo-electron energies through which a series of low-energy peaks emerges in the electron yield along the laser polarization axis. This peak sequence is universal, it does not depend on the binding potential, and is found below an excess energy of one fifth of the ponderomotive energy.
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