minimizing leakage of the optical mode out of the core and into the cladding, while here in the pseudo-spin Hall TI, the protection is enhanced by leakage into the topological "cladding" and reduction of density in the symmetry-lacking interfacial "core." In a true Chern TI, the bulk-edge correspondence principle would likely offer protection equally at both corners, since backscatterimmune edge states are guaranteed by the bulk topology regardless of local lattice symmetry at the interface.