Quantum Coherent Modulation on Photoelectron Spectra in Two Resonant Multi-Photon Ionization Process
双共振激发多光子电离过程中电离光电子谱的量子相干调制

The properties of the photoelectron spectra in two resonant multi-photon ionization process are studied by means of dressed state theory and perturbation theory.The influences on the photoelectron spectra by the area of the first pulse and the delay between two pulses are discussed under strong-field scheme.It is shown that the photoelectron spectra can be modulated by the areas of the two pulses and the delay between them.Control of Autler-Townes doublet and the interferences in doublet can be realized by the area of the first pulse and the delay between the two pulses.The selective population of dressed states (SPODS) also can be realized by this coherent quantum mechanism.The population of dressed states cannot be selected by the area of the second pulse,but obviously it can be modulated.