Suppression in high-order above-threshold ionization: destructive interference from quantum orbits
Suppression in high-order above-threshold ionization: destructive interference from quantum orbits
复制标题
高阶阈值以上电离的抑制：来自量子轨道的相消干涉
DOI：
10.1088/1361-6455/aabc83
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Liu Xiao Jun
中科院分区：
文献类型：
--
作者：
Lai Xuan Yang;Quan Wei;Yu Shao Gang;Huang Yi Yi;Liu Xiao Jun
我们通过实验研究了强激光场中稀有气体氩的阈值以上电离 (ATI) 光谱，并重点研究了高阶 ATI (HATI) 光谱中的新型抑制结构。研究发现，当 HATI 光谱中出现有据可查的类共振增强特征时，光谱的较高能量区域会出现显着的抑制结构。与时间相关的薛定谔方程的数值解很好地再现了观察结果。根据量子轨道理论，观察到的抑制结构可以归因于来自较长量子轨道的相消干涉。此外，HATI 光谱中电离抑制和电离增强之间的内在关系也已明确。
We experimentally study the above-threshold ionization (ATI) spectra of noble gas argon in an intense laser field and focus on a novel suppression structure in the high-order ATI (HATI) spectra. It is found that, when a well-documented resonancelike enhancement feature appears in the HATI spectra, a significant suppression structure is followed in a higher energy region of the spectra. The observation is well reproduced by a numerical solution of the time-dependent Schrödinger equation. In terms of quantum-orbit theory, the observed suppression structure can be ascribed to the destructive interference from longer quantum orbits. Furthermore, an intrinsic relation between the ionization suppression and the ionization enhancement in the HATI spectra is well established.