“…Christoph et al [1] and Hu et al [2,3] studied the effect of laser intensity and pulse width on photoelectron spectra of four-level Na 2 /Li 2 , and suggested that there is no Autler-Townes (AT) triple splitting for weaker pump laser intensity or shorter pulse width, longer pulse width can induce symmetric AT triple splitting. Yao et al [4], Qin et al [5] and Guo et al [6] suggested the laser intensity, pulse width and laser wavelength affect the asymmetry of AT splitting, and can control the selective population of dresses states of four-level K 2 . Sun et al [7] and Yuan et al [8] studied the effect of laser intensity, pulse width, molecular rotation and molecular alignment on photoelectron spectra of three-level Na 2 , and suggested that there is no AT double splitting for weaker laser intensity or shorter pulse width, longer pulse width can induce symmetric AT double splitting.…”