541 citations · 3.9k across the 31 of their papers we have counts for
31 papers
Antichiral surface states and higher-order topological states based on a modified Haldane model
Jia-Rui Xu, Zhan Xiong, Kai Deng +4
Antichiral surface states, characterized by unidirectional propagation on parallel surfaces, offer unique potential for controlling classical waves. However, their realization typi…
Higher-order topological phases in bilayer phononic crystals and topological bound states in the continuum
Xiao-Yu Liu, Yang Liu, Zhan Xiong +2
Recent studies on the interplay between band topology and layer degree of freedom provide an effective way to realize exotic topological phases. Here we systematically study the $C…
Topological phononic metamaterials
Weiwei Zhu, Weiyin Deng, Yang Liu +6
The concept of topological energy bands and their manifestations have been demonstrated in condensed matter systems as a fantastic paradigm toward unprecedented physical phenomena…
Hybrid topological photonic crystals
Yanan Wang, Hai-Xiao Wang, Li Liang +8
Photonic topological phases offering unprecedented manipulation of electromagnetic waves have attracted much research interest which, however, have been mostly restricted to a sing…
Possible Realization of Optical Quadratic and Dirac Points in Woodpile Photonic Crystals
Hai-Xiao Wang, Yige Chen, Guang-Yu Guo +2
The simulation of fermionic relativistic physics, e.g., Dirac and Weyl physics, has led to the discovery of many unprecedented phenomena in photonics, of which the optical-frequenc…
Ideal type-II Weyl points in twisted one-dimensional dielectric photonic crystals
Ying Chen, Hai-xiao Wang, Qiaoliang Bao +2
Weyl points are the degenerate points in three-dimensional momentum space with nontrivial topological phase, which are usually realized in classical system with structure and symme…
Higher-order topological phases in tunable -symmetric photonic crystals
Hai-Xiao Wang, Li Liang, Bin Jiang +3
We demonstrate that multiple higher-order topological transitions can be triggered via the continuous change of the geometry in kagome photonic crystals composed of three dielectri…
Observation of a phononic higher-order Weyl semimetal
Li Luo, Hai-Xiao Wang, Bin Jiang +4
Weyl semimetals are extraordinary systems where exotic phenomena such as Fermi arcs, pseudo-gauge fields and quantum anomalies arise from topological band degeneracy in crystalline…
On-chip higher-order topological micromechanical metamaterials
Ying Wu, Mou Yan, Hai-Xiao Wang +2
Higher-order topological insulators exhibit multidimensional topological physics and unique application values due to their ability of integrating stable boundary states at multipl…
Classical higher-order topological insulators
Biye Xie, Hai-Xiao Wang, Xiujuan Zhang +4
Topological states nurtures the emergence of devices with unprecedented functions in photonics, plasmonics, acoustics and phononics. As one of the recently discovered members, high…
Higher-Order Weyl Semimetals
Hai-Xiao Wang, Zhi-Kang Lin, Bin Jiang +2
Higher-order topology yields intriguing multidimensional topological phenomena, while Weyl semimetals have unconventional properties such as chiral anomaly. However, so far, Weyl p…
Higher-order topological spin Hall effect of sound
Zhi-Kang Lin, Shi-Qiao Wu, Hai-Xiao Wang +1
We propose theoretically a reconfigurable two-dimensional (2D) hexagonal sonic crystal with higher-order topology protected by the six-fold, , rotation symmetry. The acoustic…
Corner states and topological transitions in two-dimensional higher-order topological sonic crystals with inversion symmetry
Zhan Xiong, Zhi-Kang Lin, Hai-Xiao Wang +4
Macroscopic two-dimensional sonic crystals with inversion symmetry are studied to reveal higher-order topological physics in classical wave systems. By tuning a single geometry par…
Photonic Chern insulators made of gyromagnetic hyperbolic metamaterials
Ruei-Cheng Shiu, Hsun-Chi Chan, Hai-Xiao Wang +1
Controlling light propagation using artificial photonic crystals and electromagnetic metamaterials is an important topic in the vibrant field of photonics. Notably, chiral edge sta…
Anomalous Quadrupole Topological Insulators in 2D Nonsymmorphic Sonic Crystals
Zhi-Kang Lin, Hai-Xiao Wang, Zhan Xiong +2
The discovery of quadrupole topology opens a new horizon in the study of topological phenomena. However, the existing experimental realizations of quadrupole topological insulators…
Band topology in classical waves: Wilson-loop approach to topological numbers and fragile topology
Hai-Xiao Wang, Guang-Yu Guo, Jian-Hua Jiang
The rapid development of topological photonics and acoustics calls for accurate understanding of band topology in classical waves, which is not yet achieved in many situations. Her…
Symmetry-protected hierarchy of anomalous multipole topological band gaps in nonsymmorphic metacrystals
Xiujuan Zhang, Zhi-Kang Lin, Hai-Xiao Wang +5
Symmetry and topology are two fundamental aspects of many quantum states of matter. Recently, new topological materials, higher-order topological insulators, were discovered, featu…
Observation of second-order topological insulators in sonic crystals
Xiujuan Zhang, Hai-Xiao Wang, Zhi-Kang Lin +5
Topological insulators with unique gapless edge states have revolutionized the understanding of electronic properties in solid materials. These gapless edge states are dictated by…
Second-order photonic topological insulator with corner states
Bi Ye Xie, Hong Fei Wang, Hai-Xiao Wang +4
Higher-order topological insulators (HOTIs) which go beyond the description of conventional bulk-boundary correspondence, broaden the understanding of topological insulating phases…
Valley kink states and topological channel intersections in substrate-integrated photonic circuitry
Li Zhang, Yihao Yang, Mengjia He +8
Valley degrees of freedom, providing a novel way to increase capacity and efficiency of information processing, have become an important instrument for photonics. Experimental stud…
Topological light-trapping on a dislocation
Fei-Fei Li, Hai-Xiao Wang, Zhan Xiong +6
Topology has been revealed to play a fundamental role in physics in the past decades. Topological insulators have unconventional gapless edge states where disorder-induced back-sca…
Topological Node-Lines in Mechanical Metacrystals
Zhan Xiong, Hai-Xiao Wang, Jinjie Shi +4
Topological acoustic and elastic waves have recently emerged as an exciting interdisciplinary field which is still mainly focused on low-dimensional structures and model systems. H…
Topological transitions in continuously-deformed photonic crystals
Xuan Zhu, Hai-Xiao Wang, Changqing Xu +3
We demonstrate that multiple topological transitions can occur, with high-sensitivity, by continuous change of the geometry of a simple 2D dielectric-frame photonic crystal consist…
Type-II Dirac Photons
Hai-Xiao Wang, Yige Chen, Zhi Hong Hang +2
The Dirac equation for relativistic electron waves is the parent model for Weyl and Majorana fermions as well as topological insulators. Simulation of Dirac physics in three-dimens…