Phase control of the photofragment branching ratio of the HI molecule in two intense few-cycle laser pulses

A time-dependent quantum wave packet method is used to calculate the branching ratio of photodissociation products of the HI molecule in two-color intense few-cycle laser pulses with varying relative phase. It is demonstrated that the relative phase between two intense few-cycle pulses (omega and 2 omega) can be used for controlling the branching ratio of the photodissociation products I(P-2(3/2)) and I(P-2(1/2)) of the HI molecule. The nonadiabatic effect of the crossing potential energy curves on the photodissociation product yields of the HI molecule is also discussed.