 Abstract light propagates in various ways depending on its environment, such as uniform media, surfaces or interfaces, and photonic crystals. These phenomena are ubiquitous in everyday life and have been used to create advanced optics technologies. In this study, researchers discovered that a topological photonic crystal exhibits unique electromagnetic, EM, transport properties resulting from the direct frequency dispersion and multi-component spinor eigenmodes. By measuring precisely the local pointing vectors in microstrips of honeycomb structures, they were able to show that a chiral wavelet induces a global EM transportation that travels in the opposite direction to the source, which is closely linked to the topological bandgap specified by a negative Dirac mass. This novel-hygens-Frenel phenomenon is similar to the negative refraction of EM-plane waves associated with upwardly convex dispersions of photonic crystals, and these findings could lead to new advances in photonic innovations. This article was authored by Xingxiong Wang, Ji Weiguo, Wang Song, and others. We are article.tv, links in the description below.