Fig. 2: Three-dimensional (3D) spatiotemporal (ST) vortices with longitudinal and transverse orbital angular momentum (OAM).
From: Generation of spatiotemporal acoustic vortices with arbitrarily oriented orbital angular momentum
a, b The 3D iso-intensity profiles of the ST wave packets carrying longitudinal OAM and transverse OAM. The maximum intensity is set to 1, with isovalue at 0.0625, meaning that the iso-intensity profile includes all points with intensity greater than 0.0625. The orange arrows indicate the direction of OAM carried by the wave packet. c, e The amplitude and phase distributions of the cross-section passing through the center of the wave packets carrying longitudinal OAM (the cyan plane in (a)), which show the screw phase dislocation. d, f The amplitude and phase distributions of the cross-section passing through the center of the wave packets carrying transverse OAM (the cyan plane in (b)), which show the edge phase dislocation.
