Figure 11: Excitation scheme and Fermi surface. (a) Possible excitation scheme of different Pomeranchuk modes. (b) Fermi surface predicted for cuprates. The cross-like blurred feature is the FS of the stripes, while the nodal arcs are the FS of nodal particles observed in ARPES. (c) Possible Pomeranchuk modes excited by the laser for the electric field in the antinodal direction and (d) The electric field in the nodal direction. The blue line is the equilibrium Fermi surface while the red lines show the out-of-equilibrium Fermi surface after the laser excitation.