Field-free molecular orientation enhanced by tuning the intensity ratio of a three-color laser field
Huang Zhi-Yuan1, Wang Ding1, Lang Zheng2, Li Wen-Kai1, Zhao Rui-Rui1, Leng Yu-Xin1, †
       

(color online) The maximum degree of the positive (blue circle lines) and negative (red square lines) orientation with respect to the laser intensity ratio for different total laser intensities of (a) 2×10 W/cm2 and (b) 4×10 W/cm2. (c) The time evolution of molecular orientation with different intensity ratios of 1.0 (blue solid lines) and 0.5 (red dotted lines) at the same total laser intensity of 2×10 W/cm2. Black arrows represent the optimal orientation.