报告题目 (Title)：Semiconductor Topological Photonics and Novel Quantum Functions（半导体拓扑光子学与新颖量子特性）
报告人 (Speaker)：胡晓 教授（上海大学量子科技研究院）
报告时间 (Time)：2024年9月12日(周四) 15:30-16:00
报告地点 (Place)：校本部行政办公楼报告厅
邀请人 (Inviter)：钟建新 教授
主办部门：上海大学量子科技研究院，上海大学科研管理部高等研究院，上海大学理学院物理系
摘要 (Abstract)：
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.
