激发—电离模型中失谐量对电离光电子谱的影响(英文)

Influence of Detuning on the Ionization Photoelectron Spectra in Excitation-ionization Scheme

利用微扰理论和数值研究方法,讨论了调频光场作用下激发-电离物理模型中失谐量对双光子电离光电子谱特性的影响.结果表明,失谐量影响激发态的粒子在缀饰态上的选择性布居,从而对双光子电离光电子谱的特性起到调制作用;正失谐有利于将粒子布居在下缀饰态,而负失谐则有利于将粒子布居在上缀饰态.

The influence of the detuning on the properties of a two-photon ionization photoelectron spectrum in an excitation-ionization scheme under a frequency-modulated field is studied theoretically by means of the perturbation theory and numerical calculation method.It is shown that the photoelectron spectra can be modulated by the frequency detuning.This modulation is based on the selective population of dressed states（SPODS） of the excited state,and the positive detuning is propitious to the selective population on the lower dressed state,while the negative detuning leads to the selective population in the upper dressed state.