Spectral-isolated photonic topological corner mode with a tunable mode area and stable frequency
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929419164057600 |
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| author | Li, Zhongfu Li, Shiqi Yan, Bei Chan, Hsun-Chi Li, Jing Guan, Jun Bi, Wengang Xiang, Yuanjiang Gao, Zhen Zhang, Shuang Zhan, Peng Wang, Zhenlin Xie, Biye |
| author_facet | Li, Zhongfu Li, Shiqi Yan, Bei Chan, Hsun-Chi Li, Jing Guan, Jun Bi, Wengang Xiang, Yuanjiang Gao, Zhen Zhang, Shuang Zhan, Peng Wang, Zhenlin Xie, Biye |
| contents | Emergent collective modes in lattices give birth to many intriguing physical phenomena in condensed matter physics. Among these collective modes, large-area modes typically feature small-level spacings, while a mode with stable frequency tends to be spatially tightly confined. Here, we theoretically propose and experimentally demonstrate a spectral-isolated photonic topological corner mode with a tunable mode area and stable frequency in a two-dimensional photonic crystal. This mode emerges from hybridizing the large-area homogeneous mode and in-gap topological corner modes. Remarkably, this large-area homogeneous mode possesses unique chirality and has a tunable mode area under the change of the mass term of the inner topological non-trivial lattice. We experimentally observe such topological large-area corner modes(TLCM) in a 2D photonic system and demonstrate the robustness by introducing disorders in the structure. Our findings have propelled the forefront of higher-order topology research, transitioning it from single-lattice systems to multi-lattice systems. They may support promising potential applications, particularly in vertical-cavity surface-emitting lasers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10928 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectral-isolated photonic topological corner mode with a tunable mode area and stable frequency Li, Zhongfu Li, Shiqi Yan, Bei Chan, Hsun-Chi Li, Jing Guan, Jun Bi, Wengang Xiang, Yuanjiang Gao, Zhen Zhang, Shuang Zhan, Peng Wang, Zhenlin Xie, Biye Mesoscale and Nanoscale Physics Optics Emergent collective modes in lattices give birth to many intriguing physical phenomena in condensed matter physics. Among these collective modes, large-area modes typically feature small-level spacings, while a mode with stable frequency tends to be spatially tightly confined. Here, we theoretically propose and experimentally demonstrate a spectral-isolated photonic topological corner mode with a tunable mode area and stable frequency in a two-dimensional photonic crystal. This mode emerges from hybridizing the large-area homogeneous mode and in-gap topological corner modes. Remarkably, this large-area homogeneous mode possesses unique chirality and has a tunable mode area under the change of the mass term of the inner topological non-trivial lattice. We experimentally observe such topological large-area corner modes(TLCM) in a 2D photonic system and demonstrate the robustness by introducing disorders in the structure. Our findings have propelled the forefront of higher-order topology research, transitioning it from single-lattice systems to multi-lattice systems. They may support promising potential applications, particularly in vertical-cavity surface-emitting lasers. |
| title | Spectral-isolated photonic topological corner mode with a tunable mode area and stable frequency |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2401.10928 |