中国物理B ›› 2023, Vol. 32 ›› Issue (10): 107802-107802.doi: 10.1088/1674-1056/ace1d7

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Photonic Dirac cone and topological transition in a moving dielectric slab

Xinyang Pan(潘昕阳)1, Haitao Li(李海涛)1, Weijie Dong(董为杰)1, Xiaoxi Zhou(周萧溪)2, Gang Wang(王钢)1,†, and Bo Hou(侯波)3,‡   

  1. 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), Guangzhou 511400, China
  • 收稿日期:2023-05-13 修回日期:2023-06-13 接受日期:2023-06-27 出版日期:2023-09-21 发布日期:2023-09-27
  • 通讯作者: Gang Wang, Bo Hou E-mail:phwanggang@gmail.com;bohou@hkust-gz.edu.cn
  • 基金资助:
    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), and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions.

Photonic Dirac cone and topological transition in a moving dielectric slab

Xinyang Pan(潘昕阳)1, Haitao Li(李海涛)1, Weijie Dong(董为杰)1, Xiaoxi Zhou(周萧溪)2, Gang Wang(王钢)1,†, and Bo Hou(侯波)3,‡   

  1. 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), Guangzhou 511400, China
  • Received:2023-05-13 Revised:2023-06-13 Accepted:2023-06-27 Online:2023-09-21 Published:2023-09-27
  • Contact: Gang Wang, Bo Hou E-mail:phwanggang@gmail.com;bohou@hkust-gz.edu.cn
  • Supported by:
    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), and 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-II Dirac point can be turned into type-I Dirac 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

Abstract: 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-II Dirac point can be turned into type-I Dirac 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.

Key words: Dirac point, transition, moving, guided mode

中图分类号:  (Metamaterials for chiral, bianisotropic and other complex media)

  • 81.05.Xj
67.10.Ba (Boson degeneracy) 03.65.Pm (Relativistic wave equations) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)