题目:Theory and Applications of Semiconductor Topological Photonics
报告人:胡晓
邀请人:陈庆虎
时间:2024年11月1日(周五)下午15:30
地点:紫金港校区海纳苑8幢215报告厅
摘要:
Topological states of matter in absence of external magnetic field are attracting tremendous interests from both academic and application viewpoints. However, at this moment it is still hard to realize electron topology for useful applications due to the limitation on working temperature and length scale. We proposed theoretically a scheme to realize topological photonic states similar to the quantum spin Hall effect based on dielectric photonic crystals with honeycomb structures, where the C2T symmetry enables the photonic pseudospin [L.-H. Wu and X. Hu, Phys. Rev. Lett. 114, 223901 (2015)]. This scheme has been realized by nano semiconductor fabrications in both passive and active devices at room temperature and frequency ranging from microwave, telecommunication wavelengths to visible lights. In this Colloquium I will introduce the theoretical background and recent experimental progresses.
个人简介:
胡晓教授曾任日本国立物质材料研究机构(NIMS)研究主管,世界顶级计划材料纳米结构学研究中心(WPI-MANA)首席专家,日本科学技术振兴机构(JST)拓扑顶峰计划(CREST Topology)首席专家,2024年6月全职加盟上海大学。胡晓教授的专业方向是凝聚态理论物理,曾先后在日本东京大学、东北大学、筑波大学、东京工业大学、美国国家标准技术研究所(NIST)等研究机构从事教学科研工作。胡晓教授在铜氧化物高温超导磁通格子的融化相变,本征约瑟夫森结超导动力学态和太赫兹电磁波激发,拓扑超导马约拉纳準粒子探索及操控,拓扑绝缘体和拓扑半金属的理论设计,半导体拓扑光子晶体的创建以及高性能拓扑激光器的设计和开发等研究领域取得了一系列原创性成果。特别是关于半导体拓扑光子晶体理论被称为Wu-Hu模型受到广泛关注。胡晓教授在Nature Nanotechnology, Nature Communications, Physical Review Letters等顶级期刊上发表多篇论文,至今已为Advances in Physics, Advanced Materials,Superconductor Science and Technology拟写长篇综述文章。