\label{figGreen} Normalized displacement maps along the Z axis 1.0, 1.5, 2.0, 2.5, and 3.0 ms after laser emission as produced by simulation in a 5 mm disk diameter of (A) two opposite forces along the Y axis, and (B) a force along Z axis. Applied forces are illustrated by the violet arrows on the most left end side, and direction of the initial central displacement by the arrows in the white circles. 