549 citations · 1.3k across the 18 of their papers we have counts for
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Chiral Valley Edge States
Jian-Wei Liu, Gui-Geng Liu, Bo Zhang +7
Valleytronics has emerged as a promising paradigm, enabling comprehensive control of the valley degree of freedom (DoF) for energy-efficient and high-speed information processing.…
Realization of time-reversal invariant photonic topological Anderson insulators
Xiao-Dong Chen, Zi-Xuan Gao, Xiaohan Cui +5
Disorder, which is ubiquitous in nature, has been extensively explored in photonics for understanding the fundamental principles of light diffusion and localization, as well as for…
Topological temporal boundary states in a non-Hermitian spatial crystal
Mingwei Li, Jianwei Liu, Xulong Wang +3
Periodic modulation of the material index in time opens momentum gaps. Such systems are regarded as the temporal analogue of common spatial crystals, wherein the bandgaps open in t…
Symmetry-protected topological exceptional chains in non-Hermitian crystals
Ruo-Yang Zhang, Xiaohan Cui, Wen-Jie Chen +2
In non-Hermitian systems, the defective band degeneracies, so-called exceptional points (EPs), can form robust exceptional lines (ELs) in 3D momentum space in the absence of any sy…
Second Chern crystals in four-dimensional synthetic translation space with inherently nontrivial topology
Xiao-Dong Chen, Fu-Long Shi, Jian-Wei Liu +4
Topological states, first known as quantum Hall effect or Chern insulating crystal, have been generalized to many classical wave systems where potential applications such as robust…
Ideal Nodal Rings of One-Dimensional Photonic Crystals in the Visible Region
Wei-Min Deng, Ze-Min Chen, Meng-Yu Li +4
Three-dimensional (3D) artificial metacrystals host rich topological phases, such as Weyl points, nodal rings and 3D photonic topological insulators. These topological states enabl…
Metamaterials with index ellipsoids at arbitrary k-points
Wen-Jie Chen, John B. Pendry, C. T. Chan
We propose and investigate a new type of metamaterial structure composing of several interpenetrating wire meshes. Calculated band structures show that they exhibit index ellipsoid…
Multi Weyl Points and the Sign Change of Their Topological Charges in Woodpile Photonic Crystals
Ming-Li Chang, Meng Xiao, Wen-Jie Chen +1
We show that Weyl points with topological charges 1 and 2 can be found in very simple chiral woodpile photonic crystals, which can be fabricated using current techniques down to th…
Experimental observation of robust surface states on photonic crystals possessing single and double Weyl points
Wen-Jie Chen, Meng Xiao, C. T. Chan
We designed and fabricated a time-reversal invariant Weyl photonic crystal that possesses single Weyl nodes with topological charge of 1 and double Weyl nodes with a higher topolog…
Topological Invariants in Point Group Symmetric Photonic Topological Insulators
Xiao-Dong Chen, Zi-Lan Deng, Wen-Jie Chen +2
We proposed a group-theory method to calculate topological invariant in bi-isotropic photonic crystals invariant under crystallographic point group symmetries. Spin Chern number ha…
Experimental realization of photonic topological insulator in a uniaxial metacrystal waveguide
Wen-Jie Chen, Shao-Ji Jiang, Xiao-Dong Chen +2
Achieving robust transport has attracted much attention in both electronic and photonic systems. Time-reversal invariant photonic crystal can be employed to realize backscattering-…
Observation of backscattering-immune chiral electromagnetic modes without time reversal breaking
Wen-Jie Chen, Jian-Wen Dong, Zhi Hong Hang +3
A strategy is proposed to realize robust transport in time reversal invariant photonic system. Using numerical simulation and microwave experiment, we demonstrate that a chiral gui…