摘要
Femtosecond 导致激光的提高回声的 multiphoton 电离光电子光谱学(REMPI-PS ) 面临二个缺点低光谱分辨率和差的选择刺激由于女人光谱带宽。我们建议一个计划获得高分辨率的选择刺激(2+1 ) 由联合和 cosinusoidal 阶段调整的 REMPI-PS。我们的理论结果显示(2+1 ) 与附近的激动的状态有关的 REMPI-PS 信号能被阶段调整区分开来与他们的难区分的光电子系列，然后他们的选择刺激能被补加地增加 cosinusoidal 阶段调整认识到。而且，高分辨率的选择刺激的物理机制(2+1 ) REMPI-PS 被考虑二光子的力量光谱解释。
Femtosecond laser-induced resonance-enhanced multiphoton-ionization photoelectron spectroscopy （REMPI-PS） is faced with two drawbacks of low spectral resolution and poor selective excitation due to the broad spectral bandwidth. We propose a scheme to obtain a high-resolution selective excitation of （2＋1） REMPI-PS by com- bining 7r and cosinusoidal phase modulation. Our theoretical results indicate that the （2＋1） REMPI-PS signals related to neighboring excited states can be differentiated from their indistinguishable photoelectron spectra by the 7r phase modulation, and then their selective excitation can be realized by supplementally adding the cosi- nusoidal phase modulation. Furthermore, the physical mechanism of the high-resolution selective excitation of （2＋1） REMPI-PS is explained by considering the two-photon power spectrum.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 11274116, 113740995 and 1132004, the Shanghai Science and Technology Commission under Grant Nos 11JC1403500 and 10XD1401800, the National Special Science Research Program of China under Grant Nos 2010CB923203 and 2011CB808105, and the Program of Introducing Talents of Discipline to Universities under Grant No B12024.
