Realization of a three-dimensional photonic higher-order topological insulator
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913305754337280 |
|---|---|
| author | Wang, Ziyao Meng, Yan Yan, Bei Zhao, Dong Yang, Linyun Chen, Jing-Ming Cheng, Min-Qi Xiao, Tao Shum, Perry Ping Liu, Gui-Geng Yang, Yihao Chen, Hongsheng Xi, Xiang Zhu, Zhen-Xiao Xie, Biye Gao, Zhen |
| author_facet | Wang, Ziyao Meng, Yan Yan, Bei Zhao, Dong Yang, Linyun Chen, Jing-Ming Cheng, Min-Qi Xiao, Tao Shum, Perry Ping Liu, Gui-Geng Yang, Yihao Chen, Hongsheng Xi, Xiang Zhu, Zhen-Xiao Xie, Biye Gao, Zhen |
| contents | The discovery of photonic higher-order topological insulators (HOTIs) has significantly expanded our understanding of band topology and provided unprecedented lower-dimensional topological boundary states for robust photonic devices. However, due to the vectorial and leaky nature of electromagnetic waves, it is challenging to discover three-dimensional (3D) topological photonic systems and photonic HOTIs have so far still been limited to two dimensions (2D). Here, we report on the first experimental realization of a 3D Wannier-type photonic HOTI in a tight-binding-like metal-cage photonic crystal, whose band structure matches well with that of a 3D tight-binding model due to the confined Mie resonances. By microwave near-field measurements, we directly observe coexisting topological surface, hinge, and corner states in a single 3D photonic HOTI, as predicted by the tight-binding model and simulation results. Moreover, we demonstrate that all-order topological boundary states are self-guided even in the light cone continuum and can be exposed to air without ancillary cladding, making them well-suited for practical applications. Our work thus opens routes to the multi-dimensional robust manipulation of electromagnetic waves at the outer surfaces of 3D cladding-free photonic bandgap materials and may find novel applications in 3D topological integrated photonics devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_05649 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Realization of a three-dimensional photonic higher-order topological insulator Wang, Ziyao Meng, Yan Yan, Bei Zhao, Dong Yang, Linyun Chen, Jing-Ming Cheng, Min-Qi Xiao, Tao Shum, Perry Ping Liu, Gui-Geng Yang, Yihao Chen, Hongsheng Xi, Xiang Zhu, Zhen-Xiao Xie, Biye Gao, Zhen Optics Applied Physics The discovery of photonic higher-order topological insulators (HOTIs) has significantly expanded our understanding of band topology and provided unprecedented lower-dimensional topological boundary states for robust photonic devices. However, due to the vectorial and leaky nature of electromagnetic waves, it is challenging to discover three-dimensional (3D) topological photonic systems and photonic HOTIs have so far still been limited to two dimensions (2D). Here, we report on the first experimental realization of a 3D Wannier-type photonic HOTI in a tight-binding-like metal-cage photonic crystal, whose band structure matches well with that of a 3D tight-binding model due to the confined Mie resonances. By microwave near-field measurements, we directly observe coexisting topological surface, hinge, and corner states in a single 3D photonic HOTI, as predicted by the tight-binding model and simulation results. Moreover, we demonstrate that all-order topological boundary states are self-guided even in the light cone continuum and can be exposed to air without ancillary cladding, making them well-suited for practical applications. Our work thus opens routes to the multi-dimensional robust manipulation of electromagnetic waves at the outer surfaces of 3D cladding-free photonic bandgap materials and may find novel applications in 3D topological integrated photonics devices. |
| title | Realization of a three-dimensional photonic higher-order topological insulator |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2404.05649 |