Three-dimensional topological valley photonics
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909319044268032 |
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| author | Li, Wenhao Chen, Qiaolu Han, Ning Li, Xinrui Chen, Fujia Wu, Junyao Pan, Yuang Ren, Yudong Chen, Hongsheng Xue, Haoran Yang, Yihao |
| author_facet | Li, Wenhao Chen, Qiaolu Han, Ning Li, Xinrui Chen, Fujia Wu, Junyao Pan, Yuang Ren, Yudong Chen, Hongsheng Xue, Haoran Yang, Yihao |
| contents | Topological valley photonics, which exploits valley degree of freedom to manipulate electromagnetic waves, offers a practical and effective pathway for various classical and quantum photonic applications across the entire spectrum. Current valley photonics, however, has been limited to two dimensions, which typically suffer from out-of-plane losses and can only manipulate the flow of light in planar geometries. Here, we have theoretically and experimentally developed a framework of three-dimensional (3D) topological valley photonics with a complete photonic bandgap and vectorial valley contrasting physics. Unlike the two-dimensional counterparts with a pair of valleys characterized by scalar valley Chern numbers, the 3D valley systems exhibit triple pairs of valleys characterized by valley Chern vectors, enabling the creation of vectorial bulk valley vortices and canalized chiral valley surface states. Notably, the valley Chern vectors and the circulating propagation direction of the valley surface states are intrinsically governed by the right-hand-thumb rule. Our findings reveal the vectorial nature of the 3D valley states and highlight their potential applications in 3D waveguiding, directional radiation, and imaging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11715 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Three-dimensional topological valley photonics Li, Wenhao Chen, Qiaolu Han, Ning Li, Xinrui Chen, Fujia Wu, Junyao Pan, Yuang Ren, Yudong Chen, Hongsheng Xue, Haoran Yang, Yihao Optics Materials Science Topological valley photonics, which exploits valley degree of freedom to manipulate electromagnetic waves, offers a practical and effective pathway for various classical and quantum photonic applications across the entire spectrum. Current valley photonics, however, has been limited to two dimensions, which typically suffer from out-of-plane losses and can only manipulate the flow of light in planar geometries. Here, we have theoretically and experimentally developed a framework of three-dimensional (3D) topological valley photonics with a complete photonic bandgap and vectorial valley contrasting physics. Unlike the two-dimensional counterparts with a pair of valleys characterized by scalar valley Chern numbers, the 3D valley systems exhibit triple pairs of valleys characterized by valley Chern vectors, enabling the creation of vectorial bulk valley vortices and canalized chiral valley surface states. Notably, the valley Chern vectors and the circulating propagation direction of the valley surface states are intrinsically governed by the right-hand-thumb rule. Our findings reveal the vectorial nature of the 3D valley states and highlight their potential applications in 3D waveguiding, directional radiation, and imaging. |
| title | Three-dimensional topological valley photonics |
| topic | Optics Materials Science |
| url | https://arxiv.org/abs/2409.11715 |