تقرير
Realization of a three-dimensional photonic higher-order topological insulator
| العنوان: | Realization of a three-dimensional photonic higher-order topological insulator |
|---|---|
| المؤلفون: | 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 |
| سنة النشر: | 2024 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Applied Physics |
| الوصف: | 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. Comment: 23 pages,4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2404.05649 |
| رقم الأكسشن: | edsarx.2404.05649 |
| قاعدة البيانات: | arXiv |
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