Fig. 4: Intersection of vortices carrying longitudinal and transverse orbital angular momentum (OAM).
From: Generation of spatiotemporal acoustic vortices with arbitrarily oriented orbital angular momentum
a, b The three-dimensional iso-intensity profiles of the spatiotemporal wave packets combining two vortices carrying different types of OAM, obtained through theoretical calculations and experimental measurements. The maximum intensity is set to 1, with isovalue at 0.04. The orange arrows indicate the direction of the OAM carried by the wave packet, pointing towards \((0,1,1)\). c, d Theoretical calculation and experimental measurement results of the acoustic pressure field on the cross-sections passing through the center of the wave packet.
