By extending the concept of higher-order topological phases to fractal lattices, twisted Moire superlattices, and square-root constructions, we achieve the following progresses: 1. Fractal higher-order topological phases Observation of fractal higher-order topological states in acoustic metamaterials https://www.sciencedirect.com/science/article/a...

Our recent work, "Hybrid topological photonic crystals", was published as Nat. Commun. 14, 4457 (2023). https://www.nature.com/articles/s41467-023-40172-6 Congratulations to all colleagues! Abstract: Topologically protected photonic edge states offer unprecedented robust propagation of photons that are promising for w...

Our recent review, "Topological phenomena at defects in acoustic, photonic and solid-state lattices" was published as Nature Review Physics 5, 483-495 (2023). https://www.nature.com/articles/s42254-023-00602-2 Congratulations to all authors! Abstract:  There are two prominent applications of the mathematical concept of...

Topological phononic metamaterials Weiwei Zhu, Weiyin Deng, Yang Liu, Jiuyang Lu, Zhi-Kang Lin, Hai-Xiao Wang, Xueqin Huang, Jian-Hua Jiang, Zhengyou Liu The concept of topological energy bands and their manifestations have been demonstrated in condensed matter systems as a fantastic paradigm toward unprecedented physical phenomen...

Dr. Jian-Hua Jiang, serving as a leading PI, was granted a very large funding from the Ministry of Science and Technology of China. The whole sum is 28 million which is divided by 5 institutes. Congratulations!

Last year we had Yiyang and Yiling joining us. Welcome to our lab, Yiyang and Yiling. Hope you will enjoy the science here and do great jobs! Meanwhile, Rongqian graduated and earned her Ph.D. degree and continued to do a post-doc job here for a while. Congratulations Rongqian!

The inclusion of convective heat transport in thermal metamaterials is not only necessary but also crucially important to expand our scope and capability in controlling heat at will. Ideally, a thermal metamaterial should be able to simultaneously and independently manipulate both the conductive and convective heat flows. However, such thermal metamateria...

Conventional topological states are defined on flat Euclidean spaces. With acoustic metamaterials, we recently generalize the experimental study on topological states to curved surfaces and fractals. Observation of topological p-orbital disclination states in non-Euclidian acoustic metamaterials Ying Chen, Yuhang Yin, Zhi-Kang Lin, Z. H. Zheng, Y. Liu, J. L...

Conventional studies of higher-order topological states are based on discrete lattice models (e.g., tight-binding models), here we review how to reveal the higher-order topology in quasi-continuous media (such as metamaterials, photonic crystals, and phononic crystals). We connect this topic with the symmetry eigenstates at high symmetry points and t...

Corner modes in higher-order topological photons can have different frequencies, depending on the corner geometry. Here, we use this property to trap photons with sightly different frequencies at different corners in a configurable dielectric photonic crystal. https://opg.optica.org/ol/abstract.cfm?uri=ol-47-6-1454