中国物理B ›› 2023, Vol. 32 ›› Issue (10): 107802-107802.doi: 10.1088/1674-1056/ace1d7
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 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
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 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
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.
中图分类号: (Metamaterials for chiral, bianisotropic and other complex media)
- 81.05.Xj