Intense Laser-Atom Physics in Scaled Interactions

本项目着重于在远低于原子中电子结合能的频率下，利用强场相互作用的波长标度，对孤立原子与强电磁场的相互作用进行实验研究。通过使用短周期中红外（2微米和4微米）脉冲的新型电离实验来解决这些标度定律是至关重要的，因为它测试了我们对强烈激光-原子相互作用的所有理解的基础。这项建议将促成若干重要研究，包括：显著增加能够经历强激光场的原子系统的数量，允许系统地研究单电子和双电子系统，检查制备态的强场相互作用，启动标度定律的全球研究，并允许在大质量动势下对原子进行第一次高灵敏度实验。首次提出的利用强场标度定律的新研究可以解决未解决的问题，测试基本概念，探索新的极限，并可能产生新的发现，所有这些都应该增加我们对强激光原子相互作用的理解。

This project focuses on experimental investigations of the interaction of an isolated atom with an intense electromagnetic field by utilizing the wavelength scaling of the strong field interaction at frequencies much lower than the binding energy of an electron in the atom. Addressing these scaling laws with novel ionization experiments using few-cycle mid-infrared (2 micron and 4 micron) pulses is crucial since it tests the very foundations of all our understanding of the intense laser-atom interaction. A number of key studies will be enabled by this proposal and include; significantly increase the number of atomic systems capable of experiencing intense laser fields, allow systematic studies of one- and two-electron systems, examine strong field interactions for prepared states, initiate a global investigation of scaling laws and permit the first high-sensitivity experiments on atoms in large ponderomotive potentials. For the first time, the proposed novel investigations exploiting strong-field scaling laws can address unanswered questions, test fundamental concepts, explore new limits and potentially result in new discovery, all of which should add to our understanding of the intense laser-atom interaction.