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- W4280572580 abstract "Abstract We theoretically propose a uide (CCSW), which is composed of a zigzag edge-like structure based on C-4 symmetrical lattice. CCSW mode is achieved by weak coupling between a sequence of higher order topological corner state (TCS). Based on the tight-binding approximation, the flat dispersion relation of CCSW mode is obtained, and suitable for slowing down light. The characteristics of slow light, including the group index, group velocity dispersion, normalized bandwidth and normalized delay-bandwidth product, are discussed in detail. At the Eigen frequency of individual TCS, the group velocity dispersion of CCSW mode is zero. Importantly, the CCSW mode shows strong robustness when introducing disorders, compared with the conventional Coupled-Resonator-Optical Waveguide based on photonic crystal defect cavities. Our findings may find topological slow light applications such as optical buffers, the processing of optical signals, optical delay lines and so on." @default.
- W4280572580 created "2022-05-22" @default.
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- W4280572580 date "2022-06-06" @default.
- W4280572580 modified "2023-10-18" @default.
- W4280572580 title "Slow light in topological coupled-corner-state waveguide" @default.
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- W4280572580 doi "https://doi.org/10.1088/1361-6463/ac7113" @default.
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