Author Affiliations
1 Tianjin University, Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, and Key Laboratory of Optoelectronics Information and Technology, Tianjin, China
2 China University of Mining and Technology, School of Materials Science and Physics, Xuzhou, China
3 Guilin University of Electronic Technology, Guangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin, China
4 Oklahoma State University, School of Electrical and Computer Engineering, Stillwater, Oklahoma, United States
Valley topological photonic crystals (TPCs), which are robust against local disorders and structural defects, have attracted great research interest, from theoretical verification to technical applications. However, previous works mostly focused on the robustness of topologically protected edge states and little attention was paid to the importance of the photonic bandgaps (PBGs), which hinders the implementation of various multifrequency functional topological photonic devices. Here, by systematically studying the relationship between the degree of symmetry breaking and the working bandwidth of the edge states, we present spoof surface plasmon polariton valley TPCs with broadband edge states and engineered PBGs, where the operation frequency is easy to adjust. Furthermore, by connecting valley TPCs operating at different frequencies, a broadband multifunctional frequency-dependent topological photonic device with selectively directional light transmission is fabricated and experimentally demonstrated, achieving the functions of wavelength division multiplexing and add–drop multiplexing. We provide an effective and insightful method for building multi-frequency topological photonic devices.
multi-frequency topological device photonic valley Hall effect valley edge state photonic bandgap 
Advanced Photonics Nexus
2024, 3(3): 036004
Author Affiliations
1 China University of Mining and Technology, School of Materials and Physics, Xuzhou, China
2 Southeast University, State Key Laboratory of Millimeter Waves, Nanjing, China
3 Soochow University, School of Physical Science and Technology and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, China
4 Soochow University, Institute for Advanced Study, Suzhou, China
The pseudo-magnetic field, an artificial synthetic gauge field, has attracted intense research interest in the classical wave system. The strong pseudo-magnetic field is realized in a two-dimensional photonic crystal (PhC) by introducing the uniaxial linear gradient deformation. The emergence of the pseudo-magnetic field leads to the quantization of Landau levels. The quantum-Hall-like edge states between adjacent Landau levels are observed in our designed experimental implementation. The combination of two reversed gradient PhCs gives rise to the spatially nonuniform pseudo-magnetic field. The propagation of the large-area edge state and the interesting phenomenon of the snake state induced by the nonuniform pseudo-magnetic field is experimentally demonstrated in a PhC heterostructure. This provides a good platform to manipulate the transport of electromagnetic waves and to design useful devices for information processing.
photonic crystal pseudo-magnetic field edge state snake state 
Advanced Photonics Nexus
2024, 3(2): 026011
徐炯 1,2臧小飞 1,2,*
1 上海理工大学 上海市现代光学系统重点实验室,上海 200093
2 上海理工大学 光电信息与计算机工程学院,上海 200093
Kekulé晶格 非厄米系统 拓扑边缘态 狄拉克点 Kekulé lattice non-Hermitian system topological edge state Dirac point 
2023, 45(3): 1
张金英 1,2,*王炳楠 1,**王瑞 1,***王鑫野 1
1 精密光电测试仪器及技术北京市重点实验室,北京理工大学光电学院,北京 100081
2 北京理工大学长三角研究院,浙江 嘉兴 314001
材料 拓扑光子晶体 能谷结构 多波段 界面类型 拓扑边界态 
2023, 43(9): 0916001
Author Affiliations
1 School of Physics, State Key Lab for Mesoscopic Physics, Academy for Advanced Interdisciplinary Studies, Collaborative Innovation Center of Quantum Matter, and Nano-optoelectronics Frontier Center of Ministry of Education, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China
2 National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China
3 College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
4 Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong, the University of Hong Kong, Pokfulam Road, Hong Kong, China
Photonic topological insulators with robust boundary states can enable great applications for optical communication and quantum emission, such as unidirectional waveguide and single-mode laser. However, because of the diffraction limit of light, the physical insight of topological resonance remains unexplored in detail, like the dark line that exists with the crystalline symmetry-protected topological edge state. Here, we experimentally observe the dark line of the Z2 photonic topological insulator in the visible range by photoluminescence and specify its location by cathodoluminescence characterization, and elucidate its mechanism with the p-d orbital electromagnetic field distribution which calculated by numerical simulation. Our investigation provides a deeper understanding of Z2 topological edge states and may have great significance to the design of future on-chip topological devices.
photonic topological insulator edge state cathodoluminescence TMDC 
Opto-Electronic Advances
2022, 5(4): 210015
Author Affiliations
1 School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
2 State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
Antichiral gyromagnetic photonic crystal (GPC) in a honeycomb lattice with the two interpenetrating triangular sublattices A and B magnetically biased in opposite directions can realize antichiral one-way edge states propagating along the same direction at its two parallel edges. Here, we report the construction and observation of topological beam splitting with the easily adjustable right-to-left ratio in an antichiral GPC. The splitter is compact and configurable, has high transmission efficiency, and allows for multi-channel utilization, crosstalk-proof, and robust against defects and obstacles. This magnificent performance is attributed to the peculiar property that antichiral one-way edge states exist only at zigzag edge but not at armchair edge of antichiral GPC. When we combine two rectangular antichiral GPCs holding left- and right-propagating antichiral one-way edge states respectively, bidirectionally radiating one-way edge states at two parallel zigzag edges can be achieved. Our observations can enrich the understanding of fundamental physics and expand topological photonic applications.
topological photonics one-way edge state photonic crystal beam splitting topological materials 
Opto-Electronic Science
2022, 1(5): 220001
1 电子科技大学光电科学与工程学院,四川 成都 610054
2 电子科技大学长三角研究院,浙江 湖州 313001


光学器件 光子晶体 拓扑光子学 边缘态 
2022, 59(1): 0100001
中国科学院物理研究所,北京 100190
拓扑光子学 拓扑边缘态 拓扑角态 拓扑激光器 topological photonic topological edge state topological corner state topological laser 
2021, 50(11): 20210506
刘慧 1王好南 1谢博阳 1程化 1,*[ ... ]陈树琪 1,2,3,*
1 南开大学 物理科学学院,泰达应用物理研究院,弱光非线性光子学教育部重点实验室,天津 300071
2 山西大学 极端光学协同创新中心,山西太原 030006
3 山东师范大学 光场调控及应用协同创新中心,济南 250358
光拓扑绝缘体 光整数量子霍尔效应 光量子自旋霍尔效应 光Floquet拓扑绝缘体 拓扑安德森绝缘体 高阶拓扑绝缘体 拓扑保护边缘态 photonic topological insulators photonic integer quantum Hall effect photonic quantum spin Hall effect photonic Floquet topological insulators topological Anderson insulators photonic higher order topological insulators topological protected edge state 
2021, 14(4): 935
闽南师范大学, 物理与电子信息工程学院 福建 漳州 363000
量子Hall体是一种拓扑绝缘态, 它内部绝缘, 边缘导电, 存在单向导电、零电阻的边缘态。边缘态的存在, 从本质上来说是电子的磁矩与动量耦合的结果, 受到拓扑结构保护。在强磁场下, 电子的磁矩只能取一种方向, 因此边缘态电子只能沿一个方向运动, 不能往后散射。本文从一维定向移动格点系统的哈密顿量出发, 讨论了量子霍尔体系边缘态电子的低能激发和势垒散射, 得到能量本征态与本征值。研究表明: 边缘态电子的能谱是线性的, 量子隧穿概率为1, 与势垒的高度无关, 不会被散射, 电阻为零。
量子霍尔效应, 边缘态, 零电阻 quantum Hall effect edge state zero resistance 
2021, 27(2): 163

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。