Schematic of the electron trajectories driven by an elliptical field: (1) manipulating the laser ellipticity, , induces a transversal evolution of the electronhole wavepacket, controlling the closed loop in energymomentum space. v and c correspond to the valance and conduction bands, respectively, coloured according to the Berry curvature (red representing positive values and blue representing negative values). Black arrows correspond to the trajectory induced by the linear driving field and purple arrows to the elliptical driving field; (2) a top projection of the energymomentum space, c v , illustrates the intraband wavepacket evolution along the M (30 crystal orientation) and K (0 crystal orientation). The light-blue arrows represent the Berry connection increasing along the transverse evolution, leading to the accumulation of the Berry phase.
