»ã±¨±êÌâ (Title)£ºSemiconductor Topological Photonics and Novel Quantum Functions£¨°ëµ¼ÌåÍØÆ˹â×ÓѧÓëÐÂÏÊÁ¿×Ó¸öÐÔ£©

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»ã±¨¹¦·ò (Time)£º2024Äê9ÔÂ12ÈÕ(ÖÜËÄ) 15:30-16:00

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ÌáÒª (Abstract)£º

Honeycomb lattice plays an extremely important role in fostering the concept of topology with the renowned Haldane model and Kane-Mele model as the icons. We have found another method to generate topological states on honeycomb lattice where only nearest-neighbor (n.n.) hoppings are involved. The topology is induced by a texture in n.n. interactions respecting C6v symmetry, which opens a bandgap accompanied by a p-d band inversion. The C2T symmetry enables the pseudospin degree of freedom, and the topological edge state with pseudospin-momentum locking constitutes an analogue of the helical edge state in quantum spin Hall insulators. I will explain this scheme mainly focusing on semiconductor photonic crystals, and discuss perspectives of possible semiconductor topological photonics and related quantum functions.