Fig. 1: The evanescently coupled rod array arranged in a honeycomb lattice with slowly varying radii along the propagation direction (z-direction).
From: Photonic Hall effect and helical Zitterbewegung in a synthetic Weyl system
a The schematic illustration. b The first Brillouin zone in the reciprocal space of the honeycomb lattice with the positions of K = −\(\frac{{4\pi }}{{3a}}\)ex and K′ = \(\frac{{4\pi }}{{3a}}\)ex. c The distribution of the Berry curvature of the lower-energy state in the synthetic space [k, ƞ]. d, e Local distributions of the Berry curvature close to the two Weyl points
