Fig. 5: Valley-locked focusing based on the CABSs.
From: Observation of boundary induced chiral anomaly bulk states and their transport properties
a Simulated acoustic pressure field distributions at 15.5 kHz for a point source (red star) on the left of the PC, demonstrating the focusing effect. Right panel: the experimental Fourier spectrum of the acoustic field in the magenta dashed rectangle. b The black squares and red circle represent the experimentally measured intensity profiles along the red dotted lines in Figs. 2b, 5a, respectively.
