Manipulation of Resonance-Enhanced Multiphoton-Ionization Photoelectron Spectroscopy by Two Time-Delayed Femtosecond Laser Pulses  

作　　者：LU Chen-Hui ZHANG Shi-An SUN Zhen-Rong 卢晨晖;张诗按;孙真荣(State Key Laboratory of Precision Spectroscopy,and Department of Physics,East China Normal University,Shanghai 200062)

机构地区：[1]State Key Laboratory of Precision Spectroscopy,and Department of Physics,East China Normal University,Shanghai 200062

出　　处：《Chinese Physics Letters》2013年第11期76-79,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11004060,11027403 and 51132004;the Shanghai Rising-Star Program(No 12QA1400900).

摘　　要：We theoretically demonstrate that the(2+1)resonance-enhanced multiphoton-ionization(REMPI)photoelectron spectrum in a cesium(Cs)atom can be effectively manipulated by two time-delayed femtosecond laser pulses,involving its photoelectron spectral structure and photoelectron energy.We show that the photoelectron spectrum exhibits interference fringes and the fringe spacing is determined by the time delay of the two laser pulses,and the photoelectron energy is periodically modulated and the modulation period is determined by the two-photon transition frequency of the excited state.Finally,we utilize the power spectrum of the two time-delayed laser pulses and the two-photon transition probability of the excited state to respectively explain the modulations of the photoelectron spectrum and photoelectron energy.

关 键 词：FEMTO PHOTOELECTRON spectrum 

分 类 号：TN2[电子电信—物理电子学]