Fig. 4: Singular emission from the domain wall corner.
From: Room-temperature lasing from nanophotonic topological cavities
a Distribution of the Poynting vector, plotted as arrows around an isolated lasing cavity corner, indicates a singularity point. Numerically calculated with the 3D finite-element method for the triade eigenmode depicted in Fig. 1f. b Modelled far-field intensity pattern of the top corner
