Photonic Dirac cone and topological transition in a moving dielectric slab  

作　　者：潘昕阳 李海涛 董为杰 周萧溪 王钢 侯波 Xinyang Pan;Haitao Li;Weijie Dong;Xiaoxi Zhou;Gang Wang;Bo Hou(School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China;School of Optical and Electronic Information,Suzhou City University,Suzhou 215104,China;Wave Functional Metamaterial Research Facility,The Hong Kong University of Science and Technology,Guangzhou 511400,China)

机构地区：[1]School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China [2]School of Optical and Electronic Information,Suzhou City University,Suzhou 215104,China [3]Wave Functional Metamaterial Research Facility,The Hong Kong University of Science and Technology,Guangzhou 511400,China

出　　处：《Chinese Physics B》2023年第10期672-677,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.12074279);the Major Program of Natural Science Research of Jiangsu Higher Education Institutions(Grant No.18KJA140003);the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions。

摘　　要：The moving media theory is applied to a photonic confined structure which is a continuous dielectric slab waveguide with the uniaxial anisotropy and without the discrete translational symmetry.The moving effect not only brings about non-reciprocity to the whole photonic band structure in the co-moving and counter-moving directions,but also leads to the topological transition of local degenerate points within the band diagram.We demonstrate through calculation that the type-ⅡDirac point can be turned into type-ⅠDirac point when the uniaxial slab is moving over certain speed.Our results provide a new approach to regulate the topology of degeneracy for two-dimensional photonic bands in the continuous translational symmetry condition.

关 键 词：Dirac point TRANSITION MOVING guided mode 

分 类 号：O469[理学—凝聚态物理]