Yin Poo

Abstract Topologically protected photonic edge states offer unprecedented robust propagation of photons that are promising for waveguiding, lasing, and quantum information processing. Here, we report on the discovery of a class of hybrid topological photonic crystals that host simultaneously quantum anomalous Hall and valley Hall phases in different photonic band gaps.

Abstract Most natural and artificial materials have crystalline structures from which abundant topological phases emerge1,2,3,4,5,6. However, the bulk–edge correspondence—which has been widely used in experiments to determine the band topology from edge properties—is inadequate in discerning various topological crystalline phases7,8,9,10,11,12,13,14,15,16, leading to challenges in the experimental classification of the large family of topological crystalline materials4,5,6.