Abstract
A theoretical approach used for studying the multiphoton ionization of NO molecule in two-color strong femtosecond pulse laser fields is proposed. Time- and energy-resolved photoelectron energy spectra are calculated for describing the photionization process. The NO molecule is first excited to the D 2Σ + Rydberg state. The pump and probe pulses then couple the D 2Σ + with M 2Σ + states via a two-photon Raman coupling and a laser-induced continuum structure state. Three channels from the D 2Σ + and M 2Σ + states to ionization state are described. The population transfers through the continuum state and the Raman coupling passage are also calculated.
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