(a) The combined laser field with an envelope shape. The solid black line, blue dotted line, and cyan dashed line represent the x, y components and the envelope shape. The colors of background are painted in gray, red, and green, corresponding to lobes A, B, and C as shown in Lissajous curve of the inset. (b) The kinetic energy obtained from semiclassical three-step model. Black, gray, and light gray triangles represent the ionization times at lobes C, A, and B, the corresponding emission times are represented by red, magenta, and pink circles, respectively.