Extended Data Fig. 3: Optical images of AB-type topological beamformers.
From: On-chip topological beamformer for multi-link terahertz 6G to XG wireless
The optical images show the evolution of the AB-type topological beamformers from the zero-stage having 20 = 1 output taper to four-stage having 24 = 16 output tapers.
