中国物理B ›› 2007, Vol. 16 ›› Issue (1): 83-87.doi: 10.1088/1009-1963/16/1/015
张丰收1, 肖国青2, 张艳萍3, 蒙克来3
Zhang Yan-Ping(张艳萍)a)b)d)†, Zhang Feng-Shou(张丰收)a)c), Meng Ke-Lai(蒙克来)a)b)d), and Xiao Guo-Qing(肖国青)a)b)
摘要: In this paper high-order harmonic generation (HHG) spectra and the ionization probabilities of various charge states of small cluster Na2 in the multiphoton regimes are calculated by using time-dependent local density approximation (TDLDA) for one-colour (1064 nm) and two-colour (1064 nm and 532 nm) ultrashort (25 fs) laser pulses. HHG spectra of Na2 have not the large extent of plateaus due to pronounced collective effects of electron dynamics. In addition, the two-colour laser field can result in the breaking of the symmetry and generation of the even order harmonic such as the second order harmonic. The results of ionization probabilities show that a two-colour laser field can increase the ionization probability of higher charge state.
中图分类号: (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))