| 1 | Topological photonic crystals:a review显示文摘The field of topological photonic crystals has attracted growing interest since the inception of optical analog of quantum Hall effect proposed in 2008.Photonic band structures embraced topological phases of matter,have spawned a novel platform for studying topological phase transitions and designing topological optical devices.Here,we present a brief review of topological photonic crystals based on different material platforms,including all-dielectric systems,metallic materials,optical resonators,coupled waveguide systems,and other platforms.Furthermore,this review summarizes recent progress on topological photonic crystals,such as higherorder topological photonic crystals,non-Hermitian photonic crystals,and nonlinear photonic crystals.These studies indicate that topological photonic crystals as versatile platforms have enormous potential applications in maneuvering the flow of light. | Hongfei WANG Samit Kumar GUPTA Biye XIE Minghui LU | 2020 | Frontiers of Optoelectronics2020，13，1： | 1 |
| 2 | Field distribution of the Z_(2)topological edge state revealed by cathodoluminescence nanoscopy显示文摘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 crys-talline symmetry-protected topological edge state.Here,we experimentally observe the dark line of the Z_(2)photonic topo-logical insulator in the visible range by photoluminescence and specify its location by cathodoluminescence characteriza-tion,and elucidate its mechanism with the p-d orbital electromagnetic field distribution which calculated by numerical sim-ulation.Our investigation provides a deeper understanding of Z_(2)topological edge states and may have great signific-ance to the design of future on-chip topological devices. | Xiao He Donglin Liu Hongfei Wang Liheng Zheng Bo Xu Biye Xie Meiling Jiang Zhixin Liu Jin Zhang Minghui Lu Zheyu Fang | 2022 | Opto-Electronic Advances2022，5，4： | 0 |
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