Fig. 4: Experiments on one-way image transmission with chiral protection.
From: Chirality-protected extreme asymmetric acoustic information transport with noise immunity
a The experimental setup. A speaker array on the incident side is for generating the specific mode field, while a microphone array on the transmitted side is for characterizing the vortex mode composition. b The image “3” to be transferred is pixelized. The information is encoded by binary amplitude shift keying into a vortex with TC= ±1, where the pattern (1,0) represents white and the pattern (-1,0) represents blue. c Data flow decoded for the different radial mode at the transmission end for both forward and backward incidence of the ( ± 1,0) mode. d Image reconstruction under both forward and backward incidences.
