Photonic realization of chiral hinge states in a Chern-insulator stack
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929387275812864 |
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| author | Xia, Han-Rong Li, Jia-Zheng Yuan, Si-Yu Xiao, Meng |
| author_facet | Xia, Han-Rong Li, Jia-Zheng Yuan, Si-Yu Xiao, Meng |
| contents | Higher-order topological insulators, as a novel family of topological phases, are a hot frontier in condensed matter physics due to their adherence to unconventional bulk-boundary correspondence. A three-dimensional second-order topological insulator can support one-dimensional modes along its hinges (dubbed as hinge states). Here, we present a simple and direct method to construct chiral hinge modes based on a Chern-insulator stack. We analyze the existence of the hinge modes through the nontrivial quadrupole indices, and then design a photonic crystal to realize the specific flowing pattern of the hinge mode in our model. The experimental results align well with full-wave simulations, clearly demonstrating the existence of chiral hinge states. We also verify the robustness of these hinge states against defects in our photonic system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_10637 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photonic realization of chiral hinge states in a Chern-insulator stack Xia, Han-Rong Li, Jia-Zheng Yuan, Si-Yu Xiao, Meng Mesoscale and Nanoscale Physics Higher-order topological insulators, as a novel family of topological phases, are a hot frontier in condensed matter physics due to their adherence to unconventional bulk-boundary correspondence. A three-dimensional second-order topological insulator can support one-dimensional modes along its hinges (dubbed as hinge states). Here, we present a simple and direct method to construct chiral hinge modes based on a Chern-insulator stack. We analyze the existence of the hinge modes through the nontrivial quadrupole indices, and then design a photonic crystal to realize the specific flowing pattern of the hinge mode in our model. The experimental results align well with full-wave simulations, clearly demonstrating the existence of chiral hinge states. We also verify the robustness of these hinge states against defects in our photonic system. |
| title | Photonic realization of chiral hinge states in a Chern-insulator stack |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2406.10637 |