Symmetry-Related Large-Area Corner Mode with a Tunable Mode Area and Stable Frequency
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. In this Letter, we theoretically propose and experimentally demonstrate a symmetry-related large-area topological corner mode with a tunable mode area and stable frequency. This mode emerges from the hybridization of the homogeneous Dirac point mode and in-gap topological corner modes. Remarkably, this hybridized mode possesses unique chirality related to the chiral symmetry. We experimentally observe such hybridized mode in a two-dimensional (2D) photonic system and demonstrate its robustness by introducing disorders in the structure. Our findings advance the frontier of higher-order topology research, transitioning it from single-lattice systems to hybridized multilattice systems. These results may support promising potential applications, particularly in vertical-cavity surface-emitting lasers.
Authors
- Peng Zhan (ORCID: https://orcid.org/0000-0002-3416-6979)
- Biye Xie (ORCID: https://orcid.org/0000-0001-7258-8913)
- Jing Li (ORCID: https://orcid.org/0000-0003-4615-2256)
- Jun Guan (ORCID: https://orcid.org/0000-0001-8667-1611)
- Zhongfu Li (ORCID: https://orcid.org/0000-0002-6790-494X)
- Hsun‐Chi Chan (ORCID: https://orcid.org/0000-0002-9940-259X)
- Zhenlin Wang (ORCID: https://orcid.org/0000-0003-0691-0868)
- Yuanjiang Xiang (ORCID: https://orcid.org/0000-0002-7225-5411)
- Wengang Bi (ORCID: https://orcid.org/0000-0001-7736-8450)
- Shuang Zhang (ORCID: https://orcid.org/0000-0003-4556-2333)
- Bei Yan (ORCID: https://orcid.org/0000-0002-4520-9049)
- Shiqi Li (ORCID: https://orcid.org/0000-0002-7033-6541)
- Z. Gao (ORCID: https://orcid.org/0000-0002-4295-5636)
Institutions
- Hunan University (CN)
- Chinese University of Hong Kong (HK)
- Southern University of Science and Technology (CN)
- Chinese University of Hong Kong, Shenzhen (CN)
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Wuhan University of Science and Technology (CN)
- Nanjing University (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-03-20
- DOI
- https://doi.org/10.1103/physrevlett.134.116607
- Citations
- 13
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 16.21
Funders
- National Natural Science Foundation of China
- Research Grants Council, University Grants Committee
- Science, Technology and Innovation Commission of Shenzhen Municipality
- National Key Research and Development Program of China
- Basic and Applied Basic Research Foundation of Guangdong Province