Influence of intraband motion on the interband excitation and high harmonic generation

Zuo Rui-Xin^{1, 2}, Song Xiao-Hong^{1, 2, 3}, Liu Xi-Wang^{1, 2}, Yang Shi-Dong¹, Yang Wei-Feng^{1, 2, 3,}

(a) HHG spectrum for the two-color field with relative phase ϕ = 0 . The corresponding time-dependent population (blue curve with dots) and attosecond pulse field emission spectrally integrated of 10–30^th are shown in panel (c) and time–frequency analysis of emission is depicted in panel (d). (b), (d), and (f) are the same as panels (a), (c), and (e), but for ϕ = π . Adapted from Ref. ^[51].