Dependence of above-threshold ionization spectrum on polarization directions of two-color laser fields*
Liu Mina),b), Guo Ying-Chun†a), Wang Bing-Bing‡b)
       
Electron spectra for different channels with the angle between the two lasers’ polarization directions θ = 0 ((a)–(d)) and 180° ((e)–(h)). Here ω 1 = 1.165 eV, and ω 2 = 2 ω 1 ((a) and (e)), 4 ω 1 ((b) and (f)), 6 ω 1 ((c) and (g)), 10 ω 1 ((d) and (h)).